Guilingji is mainly used for kidney deficiency and yang deficiency, hypomnesis, soreness of waist and knees, cough due to qi deficiency, diarrhea in class five, etc. Guilingji can be used not only for male asthenia, but also for treating irregular menstruation and postpartum asthenia caused by deficiency of spleen and kidney yang in women. Guilingji was founded in Jiajing period of Ming Dynasty. It was a regimen carefully developed by Emperor Jiajing who gathered famous doctors from all over the world. It was given the royal name "Guilingji", which means that it can grow like a turtle. In the Qing Dynasty, Guilingji was favored by the emperors of Yongzheng and Qianlong, and was regarded as a "national treasure-level health preservation" that "one day can't be dissatisfied"