Legal basis: Civil Code of People's Republic of China (PRC).
Article 533 Significant changes have taken place in the basic conditions of a contract after the conclusion of the contract, which could not have been foreseen by the parties when the contract was concluded, and are not commercial risks. If it is obviously unfair to one party to continue to perform the contract, the adversely affected party may renegotiate with the other party; If negotiation fails within a reasonable time, the parties may request the people's court or arbitration institution to modify or terminate the contract.
The people's court or arbitration institution shall, according to the actual situation of the case, modify or terminate the contract in accordance with the principle of fairness.
Article 667 A loan contract is a contract in which the borrower borrows money from the lender, repays the loan at maturity and pays interest.
Article 675 The borrower shall repay the loan within the agreed time limit. If the term of the loan is not agreed or clearly agreed, and cannot be determined according to the provisions of Article 510 of this Law, the borrower may return it at any time; The lender may urge the borrower to return it within a reasonable period of time.