Is Ni Xiahai's fighting time in Wei Zi accurate?

There should be some accuracy! Teacher Ni is proficient in Chinese medicine, physiognomy, geomantic omen and calligraphy. Later, he wrote a book about what he learned all his life, which made great contributions to the spread and development of China's traditional culture. Judging from the extensive respect he received before his death, his level of Chinese medicine and Wei Zi's fighting skills were quite high. Teacher Ni's way of looking at the fleeting time is actually to look at the small limit, which is different from what we usually call fleeting time.