Bureau of quality and technical supervision. According to the query "People's Republic of China (PRC) Special Operation Certificate Handling Procedure", the applicant holds relevant materials to the competent department of hoisting machinery, that is, the quality supervision department or designated training center, or the municipal administrative service center and the window of the Municipal Safety Supervision Bureau, and fills in the "Application Form for Special Operation Safety Technology Training and Assessment". Therefore, the operation certificate of Rudong crane is in the Bureau of Quality and Technical Supervision.