An aerial drone photo taken on Oct. 29, 2025 shows a view of the Heicheng ruins in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region. The Heicheng ruins, built in the ninth century, was the largest and best preserved ancient city on the Silk Road. (Xinhua/Lian Zhen)

Editor Ⅰ: Zhang Wenwen

Editor Ⅱ: Wu Dan

Editor Ⅲ: Liu Guosong