1. It is a good way to study hard when you are precious. -Cai Shangsi 2. You can't see with both eyes, but you can't hear with both ears. -Xunzi 3. Everything is done with one heart and one mind, and the opportunity is lost with half-hearted. -Liu Yiming 4. Only by concentrating on learning can we get twice the result with half the effort. -Cai Yuanpei 5. Absent-minded, turn a blind eye, listen without hearing, eat without knowing its taste. 6. If you want to study effectively, you must concentrate. Learning itself is a hard thing, and only by hard work will there be corresponding gains. -Gu Chaohao 7. Learn to specialize, and don't take flooding as a virtue. -Cheng Yi 8. A gentleman's learning is more valuable, and if he is clear, he will make contributions. -Cheng Yi 9. No one is not specialized, and if you are not specialized, you can't. -Su Shi 1. Instead of spending a lot of time and energy digging many deep wells, it is better to spend the same time and energy digging a deep well. -Roman Roland