This stack composite photo taken on April 15, 2026 shows a view of the starry sky above the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Photo by Zhong Yi/Xinhua)

This photo taken on April 15, 2026 shows a view of the starry sky above the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Photo by Wang Junfeng/Xinhua)

This photo taken on April 15, 2026 shows a view of the starry sky above the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Xinhua/Xing Guangli)

This photo taken on April 15, 2026 shows a view of the starry sky above the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Xinhua/Xing Guangli)

This photo taken on April 15, 2026 shows a view of the starry sky above the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Xinhua/Xing Guangli)

This stack composite photo taken on April 15, 2026 shows a view of the starry sky above the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Photo by Zhong Yi/Xinhua)

This photo taken on April 15, 2026 shows a view of the Pelican Nebula as seen from the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Xinhua/Xing Guangli)

This photo taken on April 15, 2026 shows a view of the Eagle Nebula as seen from the Jinshanling section of the Great Wall in Chengde City, north China's Hebei Province. (Xinhua/Xing Guangli)