Both parties agree that there is no fraud, coercion, taking advantage of others' danger or infringing on the interests of a third party, and the handwritten commitment letter is valid. However, it should also be noted that the contents of the undertaking shall not violate the law, otherwise it will also affect the effectiveness of the undertaking.

legal ground

Article 469 of the Civil Code stipulates that the parties may conclude a contract in written form, orally or in other forms. Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained. A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.