It is best to sleep for 8 hours. If the body can accept Napoleon's deep sleep method, it can sleep for 3-4 hours (that is, fall asleep at night).

Learning math at noon is the most efficient.

Generally speaking, science is good during the day and liberal arts is good at night.

These are just some personal experiences that I have studied for many years, and there is no reference or scientific basis. The landlord is for reference only ~ the body varies from person to person)

However, we are scholars from all corners of the country, so we are in the same boat.