legal ground
People's Republic of China (PRC) Civil Code
Article 585 The parties may agree that one party shall pay a certain amount of liquidated damages to the other party for breach of contract, or may agree on the calculation method of the amount of compensation for losses caused by breach of contract.
If the agreed liquidated damages are lower than the losses caused, the people's court or arbitration institution may increase the liquidated damages at the request of the parties; If the agreed liquidated damages are excessively higher than the losses caused, the people's court or arbitration institution may appropriately reduce them at the request of the parties.
If the parties concerned pay liquidated damages for delayed performance, the breaching party shall also perform the debt after paying the liquidated damages.