Foreigners working in China hold a Work Permit and a residence permit, both tied to the labour contract and employer.
Renewal: the permit usually lasts one year (2-5 years for A-category talent); apply 30 days before expiry through your company to the foreign experts bureau (science/tech department) with the labour contract and social security proof.
Job change: switching employers requires a "work permit change" - the new company submits a fresh application (post and salary must meet standards); you cannot work for the new employer during the change, and visas/residence must be updated too.
Departure: when the contract ends, the company cancels the permit promptly; holders get about 30 days of transition to arrange next steps (convert visa or leave).
Common questions: moving to another city needs cross-province transfer (permit plus residence change); after layoff, a job-seeking visa or short stay may be available.
Social security and tax: China social security generally applies (waived under agreements with some countries); income tax follows progressive rates - professional advice is recommended.
