Number of customers who have obtained credit for a single project. The number of single-project credit customers with personal business loans as the main repayment source refers to the number of single-project credit customers provided by banks or other financial institutions when granting credit to personal business loan customers. For example, a bank gives an entrepreneur a credit of 500,000 yuan to open a small restaurant, and the entrepreneur's personal business is the main source of repayment, then the entrepreneur is one of the bank's single project credit customers. The greater the number of credit customers in a single project, the more dispersed the risks of banks or financial institutions, and the more stable the corresponding loan profits.