An aerial drone photo taken on June 1, 2026 shows the scenery of the Great Wall in Qianxi County, Tangshan City in north China's Hebei Province. (Photo by Liu Mancang/Xinhua)

An aerial drone photo taken on June 1, 2026 shows the scenery of the Great Wall in Qianxi County, Tangshan City in north China's Hebei Province. (Photo by Liu Mancang/Xinhua)

An aerial drone photo taken on June 1, 2026 shows the scenery of the Great Wall in Qianxi County, Tangshan City in north China's Hebei Province. (Photo by Liu Mancang/Xinhua)

An aerial drone photo taken on June 1, 2026 shows the scenery of the Great Wall in Qianxi County, Tangshan City in north China's Hebei Province. (Photo by Liu Mancang/Xinhua)

An aerial drone photo taken on June 1, 2026 shows the scenery of the Great Wall in Qianxi County, Tangshan City in north China's Hebei Province. (Photo by Liu Mancang/Xinhua)

An aerial drone photo taken on June 1, 2026 shows the scenery of the Great Wall in Qianxi County, Tangshan City in north China's Hebei Province. (Photo by Liu Mancang/Xinhua)