The oil seller read the answer

Answer 1

The Old Oil Merchant was an ancient Chinese fable about an old man who sold oil and learned to play chess by himself when he was old and eventually became a champion. The oil seller in the story was famous for his self-study and perseverance. His success benefited from his in-depth study of chess and his understanding of oil. In his story, he often used his oil knowledge and skills to solve problems and sell his oil in a simple and effective way.