The shell of the killed tortoise was coated with salt and made into powder. Tortoise shell powder is a kind of tortoise shell powder, which belongs to traditional Chinese medicine and has the effects of nourishing yin and suppressing yang, nourishing heart and calming nerves. Salt has the function of sterilization, and it is safer and more reassuring for the tortoise shell coated with salt to be ground into powder after sterilization. Therefore, it is good to coat the killed tortoise shell with salt and sprinkle with tortoise shell powder. Clinically, tortoise plastron powder is mainly used to treat symptoms caused by kidney deficiency, such as yin deficiency and hyperactivity of yang, soreness of waist and knees, palpitation and insomnia and so on. It is recommended to take the medicine under the guidance of a doctor and not to use it privately, so as not to damage your health.