Legal analysis: 1. Corporate legal persons and other organizations: (1) Legal representatives of the company and heads of other organizations; (2) Persons authorized by the company (contracts signed by unauthorized persons) Not binding on the company): Must hold the original power of attorney stamped by the company. The authorization in the power of attorney should be clear and specific. 2. Natural person (1) himself; (2) agent: holding the original power of attorney signed by himself. The authorization in the power of attorney should be clear and specific. The legal person authorization letter should include the following contents: the basic information of the authorized person, the clear scope of authorization including the time range of authorization, objects, etc., the seal of the authorizer or the authorized unit or the signature of the legal representative, and the date of authorization.

Legal basis: "Labor Contract Law of the People's Republic of China"

Article 10 To establish a labor relationship, a written labor contract shall be concluded. If a labor relationship has been established but a written labor contract has not been concluded at the same time, a written labor contract must be concluded within one month from the date of employment. If the employer and the employee conclude a labor contract before employment, the labor relationship shall be established from the date of employment.

Article 11 If the employer fails to enter into a written labor contract at the time of employment and the labor remuneration agreed with the employee is unclear, the labor remuneration of the newly recruited employee shall be based on the standards stipulated in the collective contract. ; If there is no collective contract or the collective contract does not provide for it, equal pay for equal work shall be implemented.