Is the customs exam national or provincial?

Customs is a national examination.

Customs is a national department, and recruitment of staff is usually carried out through the National Civil Service Examination (National Examination). The National Examination is a national examination organized by the State Civil Service Bureau and used to select civil servants in government agencies and institutions at all levels. As a national department, customs recruitment is also conducted through national examinations. Candidates who take the national examination need to choose the corresponding customs position to apply for. Only after passing the examination will they have the opportunity to become a member of the customs system.