The development of DeFi ecology in 2020 has directly promoted the advent of a new round of bull market in blockchain. All public blockchains, Stock Exchanges, etc. successively arrange the DeFi ecology. The DeFi ecology applications spring up like mushrooms after rain and cover DEX, oracle machine, Stablecoin, Polymerizer, wallet, etc. The coinbase, Binance, Huobi, etc. as the head transactions, own massive user base and strong background strength to develop DeFi ecology and to build their own DeFi key projects.