In this case, it is necessary to save the original voucher and then ask the other party to re-reconcile. If the other party does not admit it, it can bring a lawsuit to the court. As long as the evidence is legal, there is a great chance of winning.

Article 52 of Chapter III of the Contract Law is invalid in any of the following circumstances:

(1) One party enters into a contract by means of fraud or coercion, which harms the interests of the state;

(2) Malicious collusion that harms the interests of the state, the collective or a third party;

(3) Covering up illegal purposes in a legal form;

(4) damaging the public interest;

(5) Violating the mandatory provisions of laws and administrative regulations.

Article 53 The following exemption clauses in this contract are invalid:

(1) Causing personal injury to the other party;

(2) Causing property losses to the other party due to intentional or gross negligence.

Article 54 One party has the right to request the people's court or arbitration institution to modify or cancel the following contracts.

(1) Due to a major misunderstanding;

(2) obviously unfair at the time of conclusion of the contract.

One party made the other party conclude against its true meaning by means of fraud, coercion or taking advantage of others' danger.

The injured party has the right to request the people's court or arbitration institution to modify or terminate the contract.