2. Out of reverence for heaven, we held festivals and sacrificial ceremonies in ancient times or ate vegetarian food on the fifteenth day of the first month or during the mourning period; In other words, they believe in Buddhism and don't eat meat or blood, while those who believe in Buddhism want to achieve the goal of soaring to immortality, and adopt the Taoist method of "not eating grains and spitting flowers" in the hope of becoming immortal.