(1) Certificates of professional titles (civil engineering), builders, budgeters, safety officers, supervisors and provincial supervisors can be found in the "Housing and Urban-Rural Construction Network of this province, Construction Information Network of this province and Construction Human Resources Network of this province".
(2) Registered architects, registered structural engineers and registered civil engineers can inquire in the "Practice Qualification Registration Center of the Ministry of Construction".
(3) Registered construction engineer, you can check in "China Construction Engineer Network of the Ministry of Construction".
(4) Registered cost engineers can inquire in "China Construction Engineering Cost Management Association".
(5) The registered supervision engineer can inquire in "China Engineering Supervision Consulting Service Network".