Asset securitization refers to the business form of issuing tradable asset-backed securities to qualified investors in the form of guarantees or credit enhancements using cash flows generated by specific underlying assets or their combinations as support for repayment. In the process of asset securitization, banks first package and combine various types of credit assets with poor liquidity, and then a specialized agency SPV will reorganize and evaluate the assets in the asset pool, and issue securities to investors with the credit asset portfolio as collateral. Finally, the SPV will use the profits to repay the debt.