From infrastructure, smart contracts and parachains to NFTs, DApps and content platforms, what are the innovative ideas worth paying attention to in the second Polkadot hackathon?
Written by: OneBlock+
The second summer Polkadot hackathon developer competition officially opened on May 13th. It was co-hosted by Parity, Web3 Foundation, OneBlock+ community and PolkaWorld, and co-sponsored by IOSG, SNZ, Hashkey, Fenbushi Capital, and Multicoin.
Recruitment started on May 13 and ended on June 30. 22 teams have already submitted information and passed the preliminary interview. The members of these 22 teams have used nearly 50 days to complete the determination of ideas, project formation, and project demo development . They will all become the core force in building the Polkadot ecosystem .
The following is the basic information of the 22 teams participating in this competition, in no particular order:
Mintcraft team
1. Team members:
Captain/Development:
Tang Bohao ( https://github.com/btspoony )
Test development:
Yin Nan ( https://github.com/ww8912188 )
Technical Support:
Huang Kangning ( https://github.com/PandaNotPig )
Liu Chao ( https://github.com/neskynight )
2. Project name:
Mintcraft-blockchain toolkits for Metaverse!
Mintcraft Metaverse Blockchain Development Tool
3. Project introduction:
Mintcraft is an idea born during the spring Polkadot hackathon. It was originally planned to create a general “game chain” development paradigm. After experiencing the baptism of the spring hackathon, I found that Substrate itself has provided endless possibilities. If a limited development paradigm is built on it, this is actually a matter of turning the cart before the horse.
After observing the product ideas of the spring hackathon award-winning project and conducting an in-depth analysis of the Mintcraft product route, the Mintcraft team believes that: docking with more lightweight smart contracts, deep customization of game development tools, and providing for the development of blockchain games Lightweight expansion support , these aspects are the most worthy of breakthrough.
Therefore, the Mintcraft team re-planned the product direction and decided to set out again to participate in this summer Polkadot hackathon!
The Mintcraft team formed MintEngine Lab to create a new Mintcraft development kit:
Multi-platform blockchain service gateway
- Multi-type NFT release channel support: plans to support ink contract NFT, evm contract NFT, and native substrate NFT.
- Multiple decentralized storage channel support: It is planned to support IPFS and Swarm as NFT content storage platforms.
- Use encrypted communication to complete the unified API of multi-chain original transaction construction, sending and confirmation .
Game engine suite (based on UnrealEngine 4 Unreal Engine)
- Engine built-in software signature machine and wallet (persisted according to ethereum keystore v3 standard)
- The encryption authorization communication mechanism built in the engine and the service gateway uses ecdh + aes to ensure the symmetric encryption of the communication content. (The form of interaction with the blockchain is: initiating a request in the game -> the service gateway completes the construction of the transaction -> completes the signature in the engine component -> the service gateway sends the transaction. Therefore, all messages need to be symmetrically encrypted.)
- The engine has built-in NFT export and publishing tools based on object modules.
- The engine has a built-in NFT loader, which can dynamically load object modules when the game is running.
Smart contract and NFT
Use ink! to develop ERC1155 contract for Demo purposes .
4. Participation category:
Smart contract related, blockchain tools.
5. Project progress:
Complete the preliminary technical verification and exploration:
Complete the contract implementation of ERC1155 , and use metis to implement an ERC20 contract.
Complete the production of the demo model
API specification design of mintcraft-nft-gateway is being made, NFT gateway (implementing)
Complete the technical verification related to the production of ue4 plug-in , and start to produce ue4 (under implementation)
engine-signer software signing machine
editor-entity-builder NFT export tool
editor-entity-publisher NFT publisher (connect to nft-gateway)
runtime-entity-loader NFT loader (connect to nft-gateway)
Domain Knowledge team
1. Team members:
Founder: Gordon ( https://github.com/CHCP )
Frontend Developer: Chutian Yang ( https://github.com/yct21 )
2. Project name:
Domain Knowledge
3. Project introduction:
Domain Knowledge is a knowledge creation and sharing system based on domain knowledge . For a certain field, create the knowledge content, learning path, latest progress, recommended books and film and television works in the field .
Based on the Substrate blockchain development, the hash value of the article content is stored on the blockchain, and the article content is stored on IPFS.
4. Participation category:
Content platform
5. Project progress:
The front end is developed: homepage, document search, new draft.
The back-end completes the development: article preservation, query and other functions.
Saifan Maker Scifanchain Team
1. Team members:
Ou Xuebing, Chai Jie, Stvenyin, Li Xing, Du Yutong, Zhai Jin
2. Project name:
Scifanchain
3. Project introduction:
Saifan chain uses Substrate as the basic framework and combines the multi-person collaborative creation function provided by the application layer and the client to create a decentralized, open, inclusive, safe and intelligent sci-fi creation application chain , which injects vitality into the sci-fi ecosystem full of infinite possibilities. Create a new model of digital art.
Saifan Chain serves the science fiction industry, and its main functions include digital work chain storage, IPFS distributed storage, collaborative creation consensus, CDE development driving engine, NGL consultation governance model, etc.
Saifan Chain started from text creativity to the upstream industry, and its current functions and features are as follows:
- Calculate the workload with human creative labor as the core and issue token rewards. The value on the chain reflects the true created value of all users ;
- Provide a universe conceptual model framework that combines science and imagination to lay the foundation for all users’ collaborative creation;
- Through customized development of Pallet, create a multi-person work tree (Xinghe Linhai Project), and innovate the artistic creation, reading and dissemination mode of science fiction literature;
- Comprehensively record the entire creative process to form a unique block chain gene map of the work, so that the value of the work in circulation can be traced and scientifically distributed to the participants in each link;
- Construct a modern consultation model based on a balanced optimization algorithm (better than parliamentary voting and popular democracy) to govern the community , and build a development ecology driven by consensus.
4. Participation category:
Industry Alliance Chain
5. Project progress:
- The basic construction and data intercommunication of the chain end, application end and client have been completed;
- The chain end POE deposit Pallet has been completed and the interface is being debugged;
- The basic data API interface of the application layer and the issuance of JWF tokens have been completed, and the business logic has been written;
- The user authentication of the client is completed, and the API of the application layer has been docked with the WebSocket and RPC interfaces of the chain end, and the main business functions have been realized.
Technical architecture diagram
EternityLabs Team
1. Team members:
Deng Liangjun, Tang Huifeng, Du Linfeng, Wang Yifan, Zhu Yufeng, Liu Jiawei, Zhang Jiechen
2. Project name:
Eternity Labs
3. Project introduction:
Eternal Lab is a big data analysis platform based on substrate, which will integrate multiple functions such as quantitative trading, data modeling, risk warning, and data visualization . The project will provide a lower threshold quantitative analysis model, data analysis and other functions for the entire encryption industry.
The system network architecture is designed as a two-layer network system. The on-chain network is used to process assets and models, and the off-chain network is used to process instruction programs that consume high resources such as scientific computing. The storage of the off-chain network will be connected to the IPFS network to permanently record the instruction set and result set data of the off-chain operation.
In the design of the entire off-chain network, four types of nodes were pioneered to handle functions in different business scenarios. They are:
Scheduling node: Responsible for scheduling and distributing algorithm models *. After the main network goes online, it will dispatch and distribute multiple algorithm models and analysis of hundreds of tokens;
Quantitative node: Its function is to quantify transactions based on substrate *, to solve the difficulties of quantification in the industry, and will provide but not limited to grid transactions, hidden source models, Bayesian, hidden Markov and other advanced strategy models;
Analysis node: It will provide risk warning, data analysis, crawler * and other functions for the entire network , adapt to erc20, polkadot, heco data analysis, and monitor account addresses. At the same time, it is planned to provide hundreds of strategy analysis models;
Verification node: It will protect the node security of the entire off-chain network *, reduce the possibility of nodes doing evil, and provide a safer and smarter system for the entire ecosystem.
4. Participation category:
Open hacker
5. Project progress:
Complete the basic construction and data intercommunication of the chain end, application end and client ;
Complete the construction of most of the pallets on the chain and open the interface;
Complete more than 10 quantitative indicators, complete the API deployment of huobi and MXC, and complete part of the quantitative model;
Complete part of cryptocurrency data acquisition, storage and analysis ;
Complete the web official website , complete most of the dashboard toolbench components;
Completed the architecture design and development of most off-chain networks, and has been docked with the substrate network IPFS encrypted network and the web front-end interface.
Technology Architecture
Wasmark team
1. Team members:
Xiong Yanling
2. Project name:
Wasmark
3. Project introduction:
Wasmark is a smart contract stress testing tool . Developers provide accounts, contracts, select test nodes and methods to be tested. The results of the stress test will be used for the performance analysis of the developers in the form of graphs.
4. Participation category:
Blockchain tools
5. Project progress:
Shanghai Foreign Economic and Trade Team
1. Team members:
Li Yuhua, He Wei, Huang Jie, Wang Ningbo, Xiao Yue, Liu Feng
2. Project name:
TaiShang NFT Furnace
3. Project introduction:
Taishang NFT Alchemy Furnace is an important part of the “NFT platform based on binding rights and personal IP” , but it is also an infrastructure that provides independent services .
On the basis of not changing the original NFT contract, Taishang provides NFT combination, dismantling, life cycle, equity binding and other capabilities through the addition of “certificate contract” , forging NFT+, and creating unlimited innovative gameplay and imagination.
Schematic diagram of NFT decomposition and combination play
NFT+ content and characteristic analysis chart
4. Participation category:
NFT
5. Project progress:
- TaiShang decomposition and combination engine
Warehouse address: https://github.com/WeLightProject/Tai-Shang
Progress: in progress
- NFT Parser 0x01-basic model
Warehouse address: https://github.com/WeLightProject/NFT-Parser-0x01
Browse address: https://0x01.nft.doge.university/#/
Progress: released
- NFT Parser 0x02 —— NFT+ service secondary creation
Warehouse address: https://github.com/WeLightProject/NFT-Parser-0x02
Progress: ready to start
Udun Network Team
1. Team members:
Clark Lee, Marcos, Juline, Cindy
2. Project name:
Udun Network
3. Project introduction:
Udun Network follows the spirit of “CypherPunk” and is a future-oriented new generation of distributed cross-chain payment network . Its development and improvement is a process of software and hardware coordination in the traditional Internet payment system.
Udun Network is not only a distributed cross-chain payment network, it is also an interactive bridge that supports future digital assets and real enterprise users , and it is a future payment ecosystem built to support decentralized cross-chain circulation transactions of digital assets. .
From ecological governance, business reconstruction, application distribution to community voting, network operation , Udun Network all involves breakthroughs in the complexity of blockchain computing and communication technology.
4. Participation category:
Parachain
5. Project progress:
The official website of the product is completed and is being deployed;
Cross-chain data intercommunication is being debugged;
The deployment of the parachain development environment is completed;
Rococo node is being debugged.
Butterfly Team
1. Team members:
Tang Linfeng, Ji Qi
2. Project name:
PubComentsChain
3. Project introduction:
PubComentsChain is a new and original decentralized film and television evaluation platform . In order to solve the fundamental problem that the traditional centralized film and television evaluation cannot be objective and fair, we have introduced objective factors and designed a set of algorithm models. With the support of the algorithm model and the characteristics of the blockchain, the system can solve the traditional problems well. The problem of the centralized film review system.
After realizing the core functions of the application, we use this as an entry point to add film and television related NFT modules , DEFI modules, and related social functions (the DAO module will be involved later) to realize a film IP digital platform for producers/actors/fans. I hope to create a blockchain project based on film and television-related ecology.
4. Participation category:
Smart contract, DAPP
5. Project progress:
Legends Chain Team
1. Team members:
Wang Zhou
2. Project name:
* Legends Chain *
3. Project introduction:
Based on the social media chain developed by Substrate combined with decentralized storage , it creates a safe and free decentralized social media space.
4. Participation category:
Decentralized social media platform
5. Project progress:
Pallet is under development.
Crafting Finance Team
1. Team members:
Owen, Anray, Director Xie, Lillian
2. Project name:
Crafting Finance
3. Project introduction:
Crafting finance is a synthetic asset issuance and trading platform based on Polkadot . Crafting uses a “shared debt pool” transaction format, which can achieve almost endless transaction liquidity. Users can forge synthetic assets in Forge by staking a variety of pledges in their hands, and then join the shared debt pool in the Kingsman decentralized exchange to participate in the transaction of multiple different types of synthetic assets.
4. Participation category:
Smart contract, DAPP
5. Project progress:
NFT Mall team
1. Team members:
Team-founder: Feiying
Co-Founder: Stvenyin, Danny, hfxx, cooper
Market Support: Yueze, Dragon in the Sea
2. Project name:
NFTmall
3. Project introduction:
The vision and goal of NFTmall is to create a trading platform for NFT digital assets . In the platform, users can freely create, produce, and trade their own NFT tokens. This platform is compatible with mainstream public chains (with cross-chain functions). We study the existing trading market, combined with our own technical situation and goals, and decompose the NFTmall project into the following three parts: contract creation, trading market, and chain platform .
4. Participation category:
DApp, application chain, parachain
5. Project progress:
Complete project positioning, development path and development plan (completed)
Complete the production of the Demo model (implementing)
Public chain deployment, testing and operation (not started)
Deployment, testing and operation in NFTmall chain (not started)
Roadmap & Plan
SECC team
1. Team members:
Product: Sean
Front end: Rain, Luffy
Backend: Tang Xianjie (Zorro), Tong Lei (Eric), Hu Mingwang (dsghmw), Chen Shanzi (action), Ning Tianyang (Robin)
UI: Long Chunyu (Rain)
Test: Wang Hairong (Lotus)
2. Project name:
SECC
3. Project introduction:
The SECC (Smart Elderly Care Chain), developed based on the substrate framework, utilizes the non-tamperable, traceable, and highly transparent features of blockchain technology to connect hospitals, nursing homes, doctors, drug delivery companies, and the elderly into one Data network.
Realize online and offline interaction, remote services and the connection of wearable devices, and tracking the issuance and use of pensions, and conveniently provide the elderly with a one-stop health management and multi-win “blockchain + pension” service system.
4. Participation category:
Substrate chain
5. Project progress:
Blockchain end:
Client:
Complete the user wallet registration login page;
Complete the user binding device page;
Complete the user chronic disease maintenance page;
Finish uploading and identifying user meals;
Complete the recommended meal query.
rear end:
Complete background services (equipment manufacturers, medical institutions, IOT, IPFS data docking);
Store equipment, medical data, and IPFS data link through go-sdk;
Baidu AI dish recognition.
system structure
NFTicket team
1. Team members:
Tallone, Ezio, Ren Fengyi, Wei Xiaoping, Xu Jie, Jiang Hongchao, Adorine, Lu Xiaochuan
2. Project name:
NFTicket
3. Project introduction:
NFTicket is a decentralized ticketing system based on ink! smart contracts . Event organizers can easily create events, sell tickets and check tickets through NFTicket. Event participants can not only buy tickets to participate in the event, but also collect and trade event tickets NFT.
4. Participation category:
Smart contract, DAPP
5. Project progress:
The product is completed, the technical scheme design is completed, and the smart contract and front-end page are under development.
ONE PAPER team
1. Team members:
Frank, G, Yaren, Keene, Michael, Lisa, Tina
2. Project name:
ONE PAPER
3. Project introduction:
Through the form of blockchain, documents, journals, and papers are disseminated and shared. With the help of blockchain-based decentralized cloud storage, data retention and transmission are more secure. Users can share disk space, provide storage space for one paper and obtain tokens.
Through decentralized storage methods, decentralized journal storage provides end-to-end encrypted highly decentralized information storage functions. It has the advantages of low cost, high security, and full utilization of idle resources. It may become the mainstream cloud storage in the future. Solutions to promote the sharing of papers and knowledge.
4. Participation category:
Blockchain, decentralized cloud storage, Substrate
5. Project progress:
IPFS protocol paper completed;
Multiplayer 5+ deployment nodes are completed;
One paper official website is online;
In the Substrate node research, the basic node configuration is completed.
ExpanderGraph team
1. Team members:
HDX, Russell, ZXY, Alita, Xiaoqiang, Xiao Ma
2. Project name:
ExpanderGraph
3. Project introduction :
We are committed to mining the value of blockchain data. Provide on-chain data analysis and visualization services , and use algorithms for project rating, address labeling, address monitoring, risk control, etc., to assist users in investment decisions. Establish a data sharing incentive mechanism based on the blockchain, and build a decentralized data element trading market.
4. Entry categories:
Parachain, blockchain tool
5. Project progress:
Complete demand analysis, product design, UI-Logo design;
Completed the development of substrate parachain and data sharing incentive contract;
Back-end service program development, front-end page development (in progress)
CTT Chain Team
1. Team members:
Xiao Guoliang, Zhu Kaiwen, Feng Xiaoyan, Peng Yuefei
2. Project name:
CTT chain
3. Project introduction:
The full name of the CTT chain is the commercial trust transaction blockchain, which mainly serves the value transfer of trading commodities . Commodity experience consumers interact with the CTT chain through off-chain working machines through the S2B2C-based e-commerce platform, and their experience results participate in block competition in the form of commodity knowledge computing power.
The purpose of the CTT chain is to reach a consensus on the value of goods by experiencing the competition of consumer experience goods , rather than the current mainstream advertising model. On this basis, goods are sold through the S2B2C e-commerce platform to build a new, low-cost distribution of business Business model.
The project consists of three parts: Ctt chain, chain application, and chain management homepage. The Ctt chain is developed based on substrate and is mainly responsible for the formation of a consensus on the value of commodities; the chain application is a set of S2B2C e-commerce procedures responsible for the promotion and trading of commodities; the chain management homepage is to manage some off-chain work of the Ctt chain.
4. Participation category:
Parallel chain (independent chain)
5. Project progress:
OAK Network Team
1. Team members:
Chris Li, Leah Li, Charles Chen, Jay Line
2. Project name:
OAK Network
3. Project introduction:
This project is a dApp web application, based on the self-developed quadratic donation pallet, which is convenient for users to use the pallet and participate in donation activities, and provides user interaction (messages, likes, comments, on-chain transaction queries, and graphical donation data Etc.) function.
This quadratic vote is the general abbreviation for the Constrained Liberal Radicalism Algorithm (hereinafter referred to as CLR). CLR was proposed by Vitalik Buterin in 2018. It is a mechanism for crowdfunding matching of public goods (such as open source projects) and has been widely adopted on Ethereum through Gitcoin. Quadratic voting is the best ecosystem funding model realized through a democratic form in mathematical logic. It will be able to effectively provide donations to small network creators, thereby supporting the development of massive outstanding projects in the Polkadot ecosystem.
OAK Network will be the first to adopt the CLR module and apply it to the Polkadot ecosystem. With its own excellent scalability, it can also be built on other different blockchain networks through Substrate in the future.
The code logic and functions of the entire pallet include:
Provide 12 callable methods to provide services ;
Use on-chain storage to store custom data structures ;
Customizable creation block parameters;
Modifiable module settings;
Use substrate identity to provide identity verification function to filter bad participants;
Provide benchmarking code, and complete the accurate calculation of benchmark test and transaction fee weight.
4. Participation category:
DApp web application based on self-developed quadratic donation pallet
5. Project progress:
pallet has been completed;
Home page is complete;
The project details page has been completed;
Like and comment functions are under development;
The donation voting function is under development;
The function of querying transfer records is under development.
Web3 Vanguard Team
1. Team members:
Pan Xiaofeng: Captain, product design, blockchain development, TEE development Github: panxiaofeng418
Xiang Shun: Client Development Github: 13207166252
Li Han: Blockchain development, TEE development Github: lh6120431
Li Yiping: Technical support
2. Project name:
Web3 Vanguard (Communication is the mining APP)
3. Project introduction:
Because of the differences in policies of various countries, the application of WEB3 is likely to be faced in the future. DNS will be hijacked and the application cannot be used in the application market. In this case, not only will the user reach rate be low, but a lemon market will be formed (defective market, malicious viruses) ).
Therefore, we promote peer-to-peer communication and realize an APP that spreads that is mining . The APP ultimately manifests itself as a comprehensive autonomous platform integrating “PI token, browser, application market, decentralized vpn-client, wallet, and Defi” . Tokens are mainly used to encourage promotion.
One key point: During this peer-to-peer sharing and spreading process, ensure that the app is not tampered with. There are technically like TEE proofs, and the product has a design similar to the PI token “security circle”.
Goal: To be the best solution for general Internet users to connect to the anti-censorship Internet (an APP: solve the network connection and solve the efficient spread of high-quality anti-censorship websites/APPs).
4. Entry categories:
Open hackers, build parallel chains + independent chains
5. Project progress:
Completion of “Minimized Function Evaluation Version” 75% :
The first edition of pallet has been completed , and the second edition is in progress;
The coding of app/h5 core processes and functions has been completed , and is being tested and optimized;
Anti-tampering Confidential Computing Proof POC : Given a download address, download the APP on the TEE and generate a report that verifies whether the APP has been tampered with.
Nutbox team
1. Team members:
Guazi, Wenfeng Wang, Xi Wang, Robert Yan, Irene, Sunny Zhang, Armonio Liang
2. Project name:
Nutbox: Slot Auction Interface & Plugin
3. Project introduction:
Nutbox is a decentralized slot auction tool. Improve the user experience of the original official interface. The voting interface integrates project information and reward information, allowing voters to see at a glance.
A slot auction organization tool for the community. Through this tool, the community can quantify voting results and verify the work of members. The community can motivate key figures in the community based on user voting information and recommendation information.
This project serves as one of Nutbox’s many DAO tool systems. It is positioned in The “WordPress” for DAOs , and its purpose is to allow non-technical DAO founders to easily create decentralized pledge applications, community DeFi, decentralized content applications, etc. through the protocol provided by Nutbox to start DAO .
4. Participation category:
Blockchain tools
5. Project progress:
Support for Kusama Crowdloan has been implemented, and Polkadot’s Slot Auction will be supported.
Parallel Time Team
1. Team members:
Thriver Liu, Nov Rao, Pine Duan, Evelyn Ren
2. Project name:
Contract chain
3. Project introduction:
The contract chain is committed to solving the trust problem of project cooperation between enterprises .
Through the non-tamperable characteristics of the data on the chain, a credit system based on the completion of the historical contract has been constructed by Party A and Party B; the model of “release contract + lock-up -> complete delivery -> release or arbitration” is designed to solve the early and late stage of bilateral cooperation The issue of inequality; review miners obtain arbitration voting rights by pledged certain tokens, and guarantee the supervision and execution of the contract by means of “pledge arbitration” . Blocks will reward fair voters based on the results of the arbitration.
Issue three NFT identity tokens for Party A, Party B, and review miners , and adjust the identity credit value according to the results of each participating project, as a reference for new transaction initiators.
At the same time, since credit itself has value, we encourage the free trading of credit-anchored NFT identity tokens.
4. Participation category:
Smart contract
5. Project progress:
Taoist team
1. Team members
Frozen, Wendy, Hzm, Gala
2. Project name:
Pansub
3. Project introduction:
Pansub uses Substrate to build a blockchain to handle the file sharing ecosystem in the Web3 ecosystem , allowing users to realize fast and convenient file transfer and sharing through the Chrome plug-in , and obtain incentives from providing storage and bandwidth for sharing, changing the current Internet The trend of 2.0 becoming more and more closed allows everyone to use Web3.0 decentralized services with the experience of Web2.0 .
4. Entry categories:
Public chain
5. Project progress:
Just established the project
Polkadot Name System (PNS) team
1. Team members:
Liu Cong: Product design and UI design
Jiang Jiacheng: Blockchain Engineer
Ye Liying: Market and Business
2. Project name:
Polkadot Name System (PNS)
3. Project introduction:
The full name of PNS is the Polkadot Name System, which is a decentralized domain name system based on the Polkadot platform . This project will serve as the entrance to Web3 to provide secure, open and verifiable public domain name registration services.
PNS maintains a globally unique domain name through the registration form on the parachain, assigns short and readable names to users, supports wallet address binding, social identity binding, and DApp website address. Domain names can be traded in the form of NFT assets . PNS supports DNS resolution, so that every Substrate node becomes a DNS server.
4. Participation category:
infrastructure
5. Project progress:
The official website and product design have been completed;
Front-end development is almost complete;
The Ethereum version is under development.
The above is a summary of the 22 team project information that participated in the second Polkadot hackathon. From the construction of the Polkadot ecological chain to infrastructure construction, to development tools, to DAPP, it covers all directions of the Polkadot ecology.
It is these developers who are full of ideas and earnestly building on Polkadot that have enriched the Polkadot ecology in all aspects. We hope that through this hackathon, we can support more developers with ideas and help developers realize their ideas and dreams.
The online preliminary review will be held from July 6th to July 8th. The three official judges , Parity Engineer@Jimmy, Parity Engineer@周俊, and Parity Asia Business and Operations Manager @Helena, will select the final team.
The results of the preliminary review will be announced on the official account on July 9. Let us look forward to the hackathon which teams will successfully participate in the Demo Day and show the results to all audiences!
