When the oral promise is inconsistent with the contract, the unfavorable party may not recognize its promise, and it is difficult for the court to support it in the case of insufficient evidence. Generally speaking, oral promises and contracts are valid, unless the law requires writing.

legal ground

Article 483 of the Civil Code promises that a contract will be established when it comes into effect, unless otherwise stipulated by law or agreed by the parties. Article 465 of the Civil Code of People's Republic of China (PRC) * * * Contracts established according to law shall be protected by law. A legally established contract is legally binding only on the parties, except as otherwise provided by law. Article 490 of the Civil Code of People's Republic of China (PRC): If the parties conclude a contract in the form of a contract, the contract is concluded when the parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.