The second category of medical devices refers to medical devices whose safety and effectiveness should be controlled. The second category of medical devices, including X-ray radiography machines, B-ultrasound, microscopes and biochemical instruments, all belong to the second category of medical devices. Instruments are divided into basic surgical instruments and microsurgical instruments; Neurosurgical instruments; Ophthalmic surgical instruments; Otolaryngology surgical instruments; Dental surgical instruments; Chest cardiovascular surgical instruments, abdominal surgical instruments; Uranorectal surgical instruments Orthopedic surgical instruments; Obstetrics and gynecology surgical instruments, family planning surgical instruments; Injection puncture instruments burn (plastic) surgical instruments; General diagnostic instruments, medical electronic instruments and equipment; Medical optical instruments, instruments and endoscopic equipment, medical ultrasonic instruments and related equipment; Medical laser instruments and equipment medical high-frequency instruments and equipment.