How long can I get the certificate after the Chongqing labor service examination?

The so-called work permit, its full name is "foreigner work permit". It's a certificate from the Ministry of Labor to the Immigration Bureau.

For example, the American work permit is to prove that the applicant's permanent employment in the United States will not take away the job opportunities of American workers. If the work permit is approved, the employer can apply to the Immigration Bureau for professional immigration. After the interview, the Immigration Bureau will issue an immigrant visa.