Legal analysis: the request letter should be written by the issuer, who is the person in charge of the unit or department. Letters refer to official documents used by non-directly under the authority to negotiate work, ask and answer questions, request approval and reply to examination and approval matters. A letter is a parallel text. The issuer is the person who issues documents, and the issuer is generally the chief of the unit, the legal representative of the company or the authorized person of the main leader.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.