People look at exhibits during an art exhibition at the National Art Museum of China in Beijing, capital of China, July 23, 2019. The art exhibition with a rich collection of works related to the Qiantang River culture opened here on Tuesday. (Xinhua/Ju Huanzong)

A visitor looks at painting during an art exhibition at the National Art Museum of China in Beijing, capital of China, July 23, 2019. The art exhibition with a rich collection of works related to the Qiantang River culture opened here on Tuesday. (Xinhua/Ju Huanzong)

A visitor looks at calligraphy work during an art exhibition at the National Art Museum of China in Beijing, capital of China, July 23, 2019. The art exhibition with a rich collection of works related to the Qiantang River culture opened here on Tuesday. (Xinhua/Ju Huanzong)