“Flashing at a low altitude” is enough, and more energy is devoted to the programming he really likes. “I have no interest in going abroad, and I have never thought about studying in graduate school. For me, it is a waste of time. Jiang Fan once said. For things that he is not interested in, he will always pass by in a low-altitude attitude, and at the least cost and expense, complete these objectively necessary things to free up more time and energy. Pin what you ’re really interested in.