Dean. The director of the teaching and research section belongs to the metre, and the director of the department belongs to the department level, which is bigger than the metre, so the director of the department is bigger. The director of the teaching and research section mainly refers to the person in charge of the teaching and research section at the grass-roots level in colleges and universities according to the specialty or curriculum. In China, the director of the teaching and research section should lead and organize teachers to discuss and formulate teaching plans for various subjects in the room, draw up teaching outlines and select teaching materials.