It is harmful to the body to work at night all the time. For the rest and sleep time of human beings, from the perspective of health benefits, we should get up at sunrise and sleep at sunset, that is, to keep in line with the laws of nature as much as possible. When the sun comes out, it is the time for nature’s yang energy to rise and for the body’s yang energy to develop, so you should get up to work or do activities. When the sun goes down, the body’s yang energy should be slowly recovered with the sun, and yin begins to come out, so it is time to sleep, not to get up to work or activities when yin rises and yang falls, which is contrary to the laws of nature, the growth of yang energy and the rise and fall of yin energy, which is definitely harmful to the body in the long run.