Photo taken with a mobile phone shows people walking towards the Palace Museum in Beijing, capital of China, July 17, 2019. (Xinhua/Zhang Chao)

Photo taken with a mobile phone shows pedestrians on a street near the Palace Museum in Beijing, capital of China, July 17, 2019. (Xinhua/Zhang Chao)

Photo taken with a mobile phone shows pedestrians on a street near the Palace Museum in Beijing, capital of China, July 17, 2019. (Xinhua/Zhang Chao)