legal ground
Article 10 of the Labor Contract Law of People's Republic of China (PRC) shall conclude a written labor contract when establishing labor relations. If a labor relationship has been established and a written labor contract has not been concluded at the same time, a written labor contract shall be concluded within one month from the date of employment.
Article 5 The state adopts various measures to promote employment, develop vocational education, formulate labor standards, adjust social income, improve social insurance, coordinate labor relations, and gradually improve the living standards of laborers.