Online query method: The Ministry's Appraisal Center has opened a national professional qualification certificate query system on the National Professional Qualification Work Network (www.nvq.net.cn), providing unified query services for candidates' certificate information; you can also log in to the osta website (www.osta.org.cn) for query.

The published content includes basic information of candidates and appraisal information. The basic information of candidates includes the candidate's name, ID number, etc.; the appraisal information includes the appraisal profession, grade, admission ticket number, total score of theoretical knowledge and total score of operational skills, appraisal results, and certificate number.