The first reason is that the biggest festival of the Hui people is not the Spring Festival, but Eid al-Adha. Second, because of the traditional customs left by the ancestors of the Hui nationality. In the Ming dynasty, the border guards wrote blessings for soldiers in recognition of their contributions and posted them on the doors. After the Hui assassins learned the news, they took revenge by assassinating people who had words of praise on the door, but the Hui themselves would not post these words of blessing on the door. Over time, not sticking couplets has become the custom of Hui people.