In the Wei, Jin, Southern and Northern Dynasties, clan doctors emerged in an endless stream, and the Xu family in Donghai was the most famous. Xu Sibo, whose name was Shu Shao, his ancestor Xu Xi was taught the medical book "Bian Que Jing Jing" by foreigners, which opened the door to his family's medical studies. In the Biography of Zhang Shao in Volume 32 of Southern History, there are 5 medical records of Xu Sibo, of which 3 are the same treatment of different diseases, which reflects Xu Sibo's superb level of disease differentiation and treatment. Now the original text is excerpted as follows: