1. Qi Baishi is a master of Chinese painting in China, and his self-discipline is famous. He insists on painting every day, and never stops unless he is unwell. Once, after he painted four paintings in a row, he painted another one specially for yesterday, and wrote an inscription: "Yesterday, it was stormy, and I was restless. I never painted. Now I make up for it, and I won't spend a day without teaching."

2. Darwin, a British naturalist and founder of evolution, traveled around the world with the research ship Beagle. He traveled overseas, studied biological remains, recorded 5, words of precious materials, and finally wrote the book Origin of Species, which caused a sensation in the world, and founded the theory of evolution.

3. Edison is a world-famous inventor. He works for more than ten hours every day, and he has almost no leisure except eating, sleeping and exercising. He prolongs his working hours every day, which is equivalent to prolonging his life. Therefore, on his 79th birthday, he even claimed that he was 135 years old.

4. Lincoln is one of the most famous politicians in American history. Since he was a child, his family was poor and he had no money to go to school, so he used all the time available for study to teach himself knowledge. After he became a lawyer, he still insisted on reading various books in the library every day to enrich his knowledge and insight.