SME financing [1] refers to customized financing solutions launched by financial institutions for SMEs. Existing enterprises raise funds to complete the project investment and construction. No matter before or after the completion of the project, there will be no new independent legal person. Debt funds such as loans are actually used for project investment, but the debtor is a company rather than a project, and the cash flow and assets of the whole company can be used to repay debts and provide guarantees; In other words, the creditor has full recourse to the debt, and even if the project fails, the company must repay the loan, so the risk of the loan is relatively low.