The second kind of medical devices. According to the classification catalogue of medical devices, medical devices can be divided into one, two and three categories. The second category refers to medical devices whose safety and effectiveness should be controlled, including in vitro diagnostic reagents, extracorporeal circulation and blood processing equipment, injection puncture instruments, surgical instruments, special diagnostic reagents, medical radiation equipment, medical electronic instruments, medical optical instruments, instruments and endoscopic equipment, software, etc. The wormwood hammer is simple and easy to use.