Working in a factory has no brand name, only punching records, no salary slip and no labor contract. Is it protected by labor law? Thank you for your answers.

As long as there is a labor relationship between workers and employers, if there is no labor contract and social security is not paid, it is only a factual labor relationship between the two parties and is protected by national laws.

In labor disputes, there is evidence to prove that labor relations are the key, such as work permit or work permit (preferably stamped with official seal), salary card transaction record, salary slip, tooling with company name printed, tax payment certificate printed and sealed by local taxation bureau, temporary residence permit, attendance record, social insurance payment record handled by the employer for you, dispatch form, colleague testimony (whether leaving or going to work), audio and video recording or other written materials with your name and official seal or boss's signature.