Is it normal to go to China Mobile to sign a contract with Tietong?

It is not normal to sign a contract with China Mobile when you go to work on China Mobile.

When you go to work on China Mobile, China Mobile has a labor relationship with you. Any problems in the future will be linked to China Mobile.

Go to Tietong to sign a contract. Party A is Tietong and Party B is you. You have no relationship with the mobile company

Contracts are protected by law, and the law is also based on contracts, so you must read it clearly when signing a contract. Who is your Party A? Many recruitments now rely on dispatch companies. You have a contractual relationship with the dispatch company and have nothing to do with the place where you work. Nor will they abide by legal protection