It mainly depends on what industry you are in and what kind of enterprises and institutions you work in. First of all, the certificate of special equipment inspection and testing personnel (nondestructive testing personnel) issued by the General Administration of Quality Supervision, Inspection and Quarantine is quite popular in China. This certificate is mainly aimed at the boiler and pressure vessel industry, and many people in the construction industry also take the test. This certificate is more popular in state-owned enterprises and private enterprises. The shipbuilding industry also has the certificate of classification society, and the military and aerospace industry also has its own certificate (I am not very clear about this specific matter). Certificates from nondestructive testing societies and associations are not difficult in China. European and American countries recognize the certificates of their own nondestructive testing societies and associations. ASME, EN and AWS certificates are recognized in foreign companies and foreign certification bodies.