Yijia Chain is based on blockchain 4.0 technology, and uses sharding to solve technical bottlenecks such as high concurrency and throughput of blockchain in real business scenarios, thus building the first industry public chain, aiming at A platform for real estate transactions, leasing and investment. Construct a global disintermediation and decentralization of intelligent real estate ecology. In this way, real estate leasing and transfer with zero transaction costs can be realized. Establish the world's largest real estate transaction and leasing resource library, and anyone can upload their own real estate sales and leasing information to the public chain. Become the first industry public chain to transform traditional specific industries, and use blockchain technology to create a completely autonomous DAOs new business civilization.