1956 after the socialist transformation of capitalist industry and commerce, Beijing's private antique bookstore was merged into China Bookstore. According to the decreasing circulation of ancient books, from 1978, 309 kinds of ancient books and periodicals were copied and published, with a print run of more than 6.9 million volumes. Among them, Longxi Jingshe Series, Confucianism Case in Qing Dynasty, Ci Fu and Four-body Dictionary have high academic research value and practical reference value.