Legal analysis: the loan contract number is different from the IOU number, which can indicate the relationship between creditor's rights and debts, while the loan contract number is set for the convenience of contract management and has nothing to do with the contract content.

Legal basis: A contract established according to law in Article 8 of the Civil Code of People's Republic of China (PRC) is legally binding on the parties. The parties shall perform their obligations as agreed, and shall not alter or terminate the contract without authorization. Contracts established according to law are protected by law.