Liu Nanyuan, a senior official of the state dynasty, resigned and returned to his hometown when he was old. There is a direct messenger who is very demanding of his subordinates because of the problem of eating and drinking, and the county official is very worried about it. Liu Nanyuan said, "This is my student. I should enlighten him and let him know. " When he comes, entertain him and say, "I'm going to eat, for fear that it will interfere with your official business." I want to invite you to dinner. " But my wife has gone out of town, and no one cooks. Can we have home-cooked meals? "Pointing to make due to the teacher's command, dare not refuse. I haven't eaten my meal from morning till noon, which makes me feel very hungry. When the rice was served, there was only a bowl of rice and tofu. He ate three bowls each, pointing to make him feel full. After a while, all the food and wine were placed in front of him, and he couldn't eat any more. Liu Nanyuan insisted that he eat, and he said, "I'm full and can't eat." Liu Nanyuan said with a smile: "It can be seen that there is no distinction between fine food and coarse food. It's easy to eat when you're hungry, but it's terrible when you're full. It's just that different times have created such people. "With this lesson, I dare not blame others for this meal.