
BEIJING, CHINA - SEPTEMBER 11: A view of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.

BEIJING, CHINA - SEPTEMBER 11: A view of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.

BEIJING, CHINA - SEPTEMBER 11: A view of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.

BEIJING, CHINA - SEPTEMBER 11: Chinese and foreign tourists walk on a section of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.

BEIJING, CHINA - SEPTEMBER 11: A view of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.

BEIJING, CHINA - SEPTEMBER 11: Chinese and foreign tourists walk on a section of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.

BEIJING, CHINA - SEPTEMBER 11: Chinese and foreign tourists walk on a section of the Great Wall of China at Badaling in Beijing, China on September 11, 2017.