Since 2019, the blockchain industry has undergone breathtaking changes. Decentralized finance - DeFi - continues to grow at an exponential rate. The Total Value Locked in different DeFi protocols has exceeded 10 billion U.S. dollars. With the continuous development of numerous on-chain assets and off-chain assets going on-chain, we believe that the Total Value Locked in DeFi protocols will soon exceed 100 billion U.S. dollars. These on-chain assets require fast, frictionless, trust-free, and real-time exchange services, which has led to the rise of new decentralized exchange(DEX) protocols such as Uniswap.