Photo taken on Aug. 1, 2016 shows the starry sky in Zhengxiangbai Qi in north China's Inner Mongolia Autonomous Region. Starry sky in Inner Mongolia attracts many enthusiasts in early August. (Xinhua/Wang Junfeng) 

Photo taken on July 31, 2016 shows the starry sky in Zhengxiangbai Qi in north China's Inner Mongolia Autonomous Region. Starry sky in Inner Mongolia attracts many enthusiasts in early August. (Xinhua/Wang Junfeng)

Photo taken on July 30, 2016 shows radio telescopes of Ming Antu Observing Station under starry sky in Zhengxiangbai Qi in north China's Inner Mongolia Autonomous Region. Starry sky in Inner Mongolia attracts many enthusiasts in early August. (Xinhua/Wang Junfeng)

Photo taken on July 30, 2016 shows the sculpture of Ming Antu (1692-1765), a well-known Chinese mathematician, measuring expert and researcher in astronomy and calendars, under starry sky in Zhengxiangbai Qi in north China's Inner Mongolia Autonomous Region. Starry sky in Inner Mongolia attracts many enthusiasts in early August. (Xinhua/Wang Junfeng)

Photo taken on July 30, 2016 shows a radio telescope of Ming Antu Observing Station under starry sky in Zhengxiangbai Qi in north China's Inner Mongolia Autonomous Region. Starry sky in Inner Mongolia attracts many enthusiasts in early August. (Xinhua/Wang Junfeng)

Photo taken on July 30, 2016 shows starry sky in Zhengxiangbai Qi in north China's Inner Mongolia Autonomous Region. Starry sky in Inner Mongolia attracts many enthusiasts in early August. (Xinhua/Wang Junfeng)