Is there a labor relationship between the workers recruited by the Labor Bureau 1998?

According to China's "Labor Law", the employer and the employee shall sign a written labor contract and perform their respective rights and obligations according to the contract. If 1998 is a laborer recruited with the seal of the Labor Bureau, a written or oral agreement that is recognized by both parties and has legal effect and meets the requirements of relevant national regulations has been established between these laborers and the employing unit, that is, there is a clear and stable employment relationship.