You Token digital asset application system (YTK for short) is a blockchain financial ecosystem with complex business models and landing applications. YTK is an ecological platform based on the financial industry, the world's top technology research and development, digital payment solutions covering all areas of financial ecology, real-time seamless exchange and transaction payment, and is committed to creating the world's first truly composite business model and landing application An all-in-one blockchain financial ecological APP. On the basis of peer-to-peer network technology, a new global financial ecology is built based on blockchain and smart contract technology.