Legal analysis: Blank IOU signature is generally valid. As a person with full capacity for civil conduct, the borrower of blank IOUs should foresee and be able to foresee the legal consequences that will be borne after signing. Generally speaking, the law of signing blank IOUs can infer that the borrower has ratified or recognized the contents of IOUs, so the borrower should bear the necessary responsibilities when signing blank IOUs.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 667 A loan contract is a contract in which the borrower borrows money from the lender, repays it at maturity and pays interest.

Article 668 A loan contract shall be in written form, unless otherwise agreed between natural persons.

The contents of a loan contract generally include terms such as loan type, currency, purpose, amount, interest rate, term and repayment method.

Article 669 When concluding a loan contract, the borrower shall provide the true information about the business activities and financial status related to the loan according to the requirements of the lender.