You can't. Xiao Xiurong's authorization code cannot be reused. Authorization code is the only identification of genuine books, which can be obtained by scraping the coating on the book cover. It can only be used once and cannot be repeated. Xiao Xiurong, a native of Fujian, is a professor and postgraduate tutor at Minzu University of China, and has been engaged in the research and teaching of basic Marxist theories for a long time.