There are many other contents in the study of Mozi's present situation, but few people specialize in Mozi's vocational education. Mohism has been silent for about 1,700 years since the pre-Qin Dynasty, from burning books to burying Confucianism in the Qin Dynasty to ousting hundreds of schools in the Han Dynasty. Before the 20th century, the main achievement of Mozi research was in the Qing Dynasty, and Sun Yirang wrote Notes on Mozi.