Illegal and part-time jobs should also sign labor contracts, and the labor relationship between them and the employer should be clarified through labor contracts. If the employer does not sign the contract, the legal consequence is to pay compensation and renew the contract in time.
 As long as there is a labor relationship between the laborer and the employer, a labor contract should be signed. It is illegal not to sign a labor contract.
 The labor contract is an agreement between the laborer and the employer to establish a labor relationship, clarify the rights and obligations of both parties, and is a written legal evidence for the laborer and the employer to establish a labor relationship in accordance with relevant laws and regulations. The labor contract is an important basis for stabilizing labor relations, strengthening labor management by employers, protecting the rights and interests of workers, and resolving disputes between both parties.
 [Legal basis] Article 16 of the Labor Law of the People's Republic of China is an agreement between a worker and an employer to establish a labor relationship and clarify the rights and obligations of both parties. To establish labor relations, a labor contract shall be concluded.
 Article 17 The conclusion and modification of labor contracts shall follow the principles of equality, voluntariness and consensus through consultation, and shall not violate the provisions of laws and administrative regulations. A labor contract is legally binding once it is concluded in accordance with the law, and the parties must perform their obligations under the labor contract.
 Legal basis
 Article 16 of the Labor Law of the People's Republic of China, a labor contract is an agreement between a worker and an employer to establish a labor relationship and clarify the rights and obligations of both parties.
 To establish labor relations, a labor contract shall be concluded.
 Article 17 of the Labor Law of the People's Republic of China: The conclusion and modification of labor contracts shall follow the principle of equality, voluntariness and consensus through consultation, and shall not violate the provisions of laws and administrative regulations.
 A labor contract is legally binding once it is concluded in accordance with the law, and the parties must perform their obligations under the labor contract.