Xinjiekou Xinhua Bookstore. Known by querying Baidu map information. The Nanjing Seven O'clock Reading Club is located at No. 56, Zhongshan East Road, Qinhuai District, Nanjing City, Jiangsu Province. The 52nd issue of "Bookish Nanjing at Seven O'clock" on July 24, 2023 specially invited Ding, a member of the Chinese Calligraphers Association and a specially appointed calligrapher of the Jiangsu Provincial Traditional Chinese Painting Academy. Nan visited the concert hall on the second floor of Xinjiekou Xinhua Bookstore and held a lecture on the theme of "History of Calligraphy Stories in Nanjing through the Past Dynasties", telling anecdotes about local calligraphy in Nanjing.