Is it reliable for labor dispatch to sign a contract with a tripartite company? Afraid of being pitted

Whether it is reliable is first of all whether it is legal in form, which should be determined in combination with specific matters such as contract content, rights and obligations, and second, whether it is reliable in substance, such as whether the company is legally registered, whether there is a record of being punished, and even whether the company exists, whether it has office space and so on! So we can't simply describe the process to judge. It is recommended to consult a lawyer face to face in the local area with relevant materials.