Some teachers are paid and don't have to attend classes. How can you criticize them?

Some teachers are paid, so they can criticize the vegetarian meal when they are not in class. The vegetarian meal in the body is the same as that of some paid teachers who don't have to attend classes. "Vegetarian meal in a corpse" is an idiom derived from a historical story, and its related allusion comes from the biography of Han Shu and Zhu Yun written by Ban Gu in the Eastern Han Dynasty. The original meaning of a vegetarian meal in a corpse is to occupy a position, do nothing and eat for free. Later, it was also used as a courtesy word to show that he had not done his duty. It can act as a predicate and an object in a sentence. With a derogatory connotation.