The original text of "Sini Tang" may be "Huini Tang". It also means "returning Yang to save Ni". According to the "Ancient Kangping Treatise on Febrile Diseases" copied by envoys from the Tang Dynasty and brought to Japan, it is obviously earlier than the existing "Song Version Treatise on Febrile Diseases" in China. Moreover, it should also be interpreted from a literary and scientific perspective as a reverse, and not as a reverse of the medicine.

Indications: Shaoyin disease. Reverse limbs, aversion to cold, crouching down, lack of energy and desire to sleep, abdominal pain, vomiting without thirst, white and slippery tongue coating, and thready pulse; or Taiyang disease caused by sweating and loss of yang.