Strictly speaking, after the full-time contract system, enterprises no longer have the title of formal workers. Contract worker: refers to the form of employment that is regulated by labor laws and regulations after signing a labor contract with an enterprise. Labor service: refers to a form of employment that does not form labor relations with enterprises. The main purpose of adopting this form of employment is to avoid labor risks and reduce labor costs. Temporary worker: it is a temporary employment form that provides labor services for enterprises. At present, this term has been gradually reduced in labor and employment, whether it is contract workers or laborers, it is often difficult to define after labor disputes. In terms of treatment, of course, contract workers are better, that is, formal employees of enterprises.