BEIJING,CHINA – APRIL 20: A photo taken on April 20, 2018 shows the outside view of The National Library of China, largest library in Asia, ranking third in the world’s national library with its of 280 thousand square meters area, within the ‘World Book Day’ in Beijing, China. World Book Day is an annual event on April 23rd, organized by the United Nations Educational, Scientific and Cultural Organization (UNESCO), to promote reading, publishing and copyright.