On August 15th, the credit credit evaluation startup Graychain released a 26-page Defi loan product report showing that crypto loans are currently worth more than $4.7 billion, but lenders only earn $86 million (or 1.83%). Interest income. At present, credit is considered to be one of the important mechanisms to increase the liquidity of the economic system. The higher the liquidity of the market, the higher the operational efficiency. In order to promote the cryptocurrency as a powerful value exchange medium, we need to promote lending. . Therefore, this report focuses on the current credit industry in defi (decentralized finance). Currently, cryptocurrency lending products are mortgage loans. In other words, 100% of encrypted lending must be guaranteed.