Although the contract has been signed, it can actually be revoked if the statutory conditions for revocation are met.
If the other party forces you to sign the contract by fraud, or deception, or by violent coercion or other means, then the contract can actually be revoked, but you must apply to the court or arbitration institution for revocation, and it is best to apply to the court to revoke the contract.
After signing the contract, I went home and found that the content of the contract was different from the one negotiated with the other party, and there were disagreements in it, even if the other party refused to cancel the contract, then I could go to the court to unilaterally revoke the contract, because at this time the content of the contract was inconsistent with the other party's negotiation, and I felt that the other party was fraudulent.
After signing the contract, go home and find that the things negotiated in the contract are inconsistent with the things negotiated with the other party, and there are differences in it, and you feel that the other party has fraudulent behavior and has a set of behavior, then in this case, you can negotiate with the other party in advance, if the negotiation cannot be reached, and the other party insists on not wanting to revoke the contract, then you can apply to the court for revocation at this time, after all, the other party is unwilling to change the contract by consensus, so that is to say, the other party has fraudulent behavior and set up a set of behaviors. In this case, the court can revoke the validity of the contract, consider the contract invalid, and use legal means to determine that the contract has no legal effect.
After the contract is signed, if you feel that the content of the contract is different from what was negotiated at the beginning, and the other party insists on refusing to revoke the contract, if you think that the other party has deceitful, fraudulent or set up a trap, as long as you collect evidence, as long as there is evidence to prove that the other party does not agree to revoke the contract, then you have the right to apply to the court to revoke the contract and revoke the legal effect of the contract.