If necessary, Jinan guarantee company should first check whether the company's business license, business license and other documents are complete; Understand the company's registered capital, business scope, shareholder background and other information; Understand the company's business scope and operating conditions, such as what guarantee business the company is mainly engaged in, its position in the industry and its economic strength; Understand the company's management and risk control capabilities, as well as the company's credibility and customer evaluation.