There is a saying in the contract law that the people's court or arbitration institution shall not revoke it if the parties request to change it. Please explain this sentence in detail.

Give the injured party a choice. The second sentence was added later because the principle of contract law is to encourage transactions, and the purpose of legislation is to encourage the conclusion of contracts. Therefore, if the injured party wants to make changes and continue to perform, the court or arbitration institution should try the case in the spirit of promoting the contract as much as possible, and cannot directly cancel it. At the same time, it also embodies the autonomy of the will in civil law, and people don't need to change or cancel it!