After obtaining the certificate, on-site professionals should continue to receive education every three years.

Eight key technical posts of construction enterprises: builder, quality engineer, safety officer, standard engineer, material engineer, mechanic, laborer and information officer. The new standard JJ/T 250-2011redefined the professional standards of professionals in the construction site, which was issued on July 1 13, 2003 and implemented on October/0/2, 2002.