Legal analysis: Teachers' contract in training institutions is a kind of labor contract, which includes information of both parties, labor term, salary, work content and so on.

Legal basis: People's Republic of China (PRC) Labor Contract Law.

Article 2 This Law is applicable to enterprises, individual economic organizations, private non-enterprise units and other organizations (hereinafter referred to as employers) in People's Republic of China (PRC) to establish labor relations with laborers and conclude, perform, modify, dissolve or terminate labor contracts.

State organs, institutions, social organizations and laborers who have established labor relations with them shall conclude, perform, modify, dissolve or terminate labor contracts in accordance with this Law.

Article 10 To establish labor relations, a written labor contract shall be concluded.

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.

If the employer and the employee conclude a labor contract before employment, the labor relationship shall be established from the date of employment.