It's normal for the two of them not to know.
Like ordinary doctors, they only know medical books like the Inner Canon of Huangdi.
When Ning Zhengde and Ning Miaoyan looked at him seriously, Su Fan also explained in detail:
"Traditional Chinese medicine originated from the Yellow Emperor, and during the times of the Yellow Emperor and Shennong, there was a group of people dedicated to studying Qi Huang's medical skills."
"This group of people inherited the medical knowledge of the Yellow Emperor and Shennong, and continuously developed it during the inheritance process."
"These people are called the Qi Huang school, including themselves, their disciples, and their disciples' disciples."
"For thousands of years, they have been painstakingly studying medical techniques."
"They compiled their research over thousands of years into the Qi Huang Medical Canon."
