There are probably four main types; First, project loans. The lenders of PPP projects are usually commercial banks and export credit institutions. , the financier can be one or several; Second, bond financing. According to the current bond rules, PPP project companies that meet the issuance conditions can issue perpetual bonds (such as sustainable bills, medium-term bills, short-term financing bills, etc.) in the inter-bank trading market; Third, funds can be financed by government-led industrial funds or social capital; Fourth, asset securitization. The accounts receivable and income rights of qualified PPP project companies can be financed through enterprise asset securitization. Specifically, as the initiator (original owner), PPP project company will combine the basic assets that can generate stable cash flow in the future under PPP project to form a basic asset package, enter the market and sell it to the established special purpose institution (SP), and issue asset-backed securities to investors in the securities market with the cash flow generated from the basic assets, and use the subscription funds for the construction and operation of the project company.