Article 533 of China’s Civil Code covers a contract whose basic conditions change in a major way that the parties could not foresee and that is not a commercial risk. If continued performance would be clearly unfair to one party, “the party adversely affected may renegotiate with the other party.” Only if they fail to agree within a reasonable time may either party ask a court or an arbitration body to change or end the contract.
In one reported case, a court refused a request for higher rent based on rising prices.