I want to ask why some great Zen masters and even some great scholars, such as Zeng Guofan, died at night.

Because, in ancient times, it was said that monarchs or monks had magical powers. It is said that their divine power is innate, and some fortune tellers can learn about the masters of the world through astrology. However, basically, some people who have contributed to society have passed away, and there may be burning on the night of their death. But so far, experts have not had a definite reason. [All the above are inferred from images. ]