Wang Xudong (2nd L, Front), the curator of the Palace Museum, watches staff produce printmaking on canvas bags at the Palace Museum in Beijing, capital of China, May 18, 2019. Saturday marks the 43rd International Museum Day. With the theme of "Museum as Cultural Hubs: the Future of Tradition", the Palace Museum organized various themed activities to build a bridge between museum and public. (Xinhua/Jin Liangkuai)