Idiom Dictionary: Zhuangzi. Master of health care: "it means that poverty is the salary, and the fire spreads. I don't know what to do." The original wood was burned out, but the fire can still be passed down, indicating that the bones are exhausted and the spirit is immortal.

Later used to describe knowledge and skills passed down from generation to generation.

Modern Chinese dictionary: the previous firewood has just been burned, and the next firewood has been burned, and the fire will never go out. It is a metaphor for teachers and students to teach and learn from each other from generation to generation.

I hope I can help you. Thank you. Let's go