Photo taken on Nov. 24, 2020 shows an exhibit displayed during an exhibition on ancient Chinese bronze mirrors at the National Museum of China in Beijing, capital of China. (Xinhua/Jin Liangkuai)

A visitor views exhibits during an exhibition on ancient Chinese bronze mirrors at the National Museum of China in Beijing, capital of China, Nov. 24, 2020. (Xinhua/Jin Liangkuai)

A visitor views exhibits during an exhibition on ancient Chinese bronze mirrors at the National Museum of China in Beijing, capital of China, Nov. 24, 2020. (Xinhua/Jin Liangkuai)

Photo taken on Nov. 24, 2020 shows an exhibit displayed during an exhibition on ancient Chinese bronze mirrors at the National Museum of China in Beijing, capital of China. (Xinhua/Jin Liangkuai)