Especially difficult! At the beginning, I like to punch in my circle of friends every day to prove my persistence and hard work. Later, once it became a habit, you disdained to send it. I don't want to say that getting up early and exercising will bring you many benefits. All my feelings are based on your persistence. A day's work lies in the morning, and getting up early to exercise is the embodiment of the mentality. I started to get up early in 2007, and since then I have developed the habit of getting up early. When I was a graduate student, my school was close to Qianfo Mountain. If it weren't for the wind and rain, I would go to the mountains almost every day. Personal experience, full of energy and improved work efficiency. Fortunately, I held on.