Legal analysis: 1. Negotiate with customers. 2. If negotiation fails, you may request an arbitration institution to arbitrate or bring a lawsuit to a people's court. The legal and reasonable way to collect debts is to sue in the people's court and demand repayment from the other party, which can not only guarantee the limitation, but also confirm the creditor's rights, and finally apply to the people's court for compulsory execution. This is the way most people collect debts.

Legal basis: Article 667 of the Civil Law of People's Republic of China (PRC) is a loan contract in which the borrower borrows money from the lender, repays the loan at maturity and pays interest.