Aerial photo taken on March 27, 2020 shows a suburban train running near the Shuiguan Great Wall in Beijing, capital of China. (Xinhua/Ju Huanzong)
Aerial photo taken on March 27, 2020 shows a suburban train running near the Shuiguan Great Wall in Beijing, capital of China. (Xinhua/Ju Huanzong)
Aerial photo taken on March 27, 2020 shows a suburban train running near the Juyongguan Great Wall in Beijing, capital of China. (Xinhua/Ju Huanzong)
Aerial photo taken on March 27, 2020 shows a suburban train running near the Juyongguan Great Wall in Beijing, capital of China. (Xinhua/Ju Huanzong)
Aerial photo taken on March 27, 2020 shows a suburban train running near the Juyongguan Great Wall in Beijing, capital of China. (Xinhua/Ju Huanzong)