Aerial photo taken on July 29, 2020 shows the scenery of the Tiansheng Sanqiao (or three natural bridges) scenic area in Wulong District of Chongqing, southwest China. The Tiansheng Sanqiao scenic area, where three natural stone arches look like bridges, is a popular tourist attraction. (Xinhua/Liu Chan)

Aerial photo taken on July 29, 2020 shows the scenery of the Tiansheng Sanqiao (or three natural bridges) scenic area in Wulong District of Chongqing, southwest China. The Tiansheng Sanqiao scenic area, where three natural stone arches look like bridges, is a popular tourist attraction. (Xinhua/Liu Chan)

Stitched aerial photo taken on July 29, 2020 shows people visiting the Tiansheng Sanqiao (or three natural bridges) scenic area in Wulong District of Chongqing, southwest China, July 29, 2020. The Tiansheng Sanqiao scenic area, where three natural stone arches look like bridges, is a popular tourist attraction. (Xinhua/Liu Chan)

Aerial photo taken on July 29, 2020 shows the scenery of the Tiansheng Sanqiao (or three natural bridges) scenic area in Wulong District of Chongqing, southwest China. The Tiansheng Sanqiao scenic area, where three natural stone arches look like bridges, is a popular tourist attraction. (Xinhua/Liu Chan)

People visit the Tiansheng Sanqiao (or three natural bridges) scenic area in Wulong District of Chongqing, southwest China, July 29, 2020. The Tiansheng Sanqiao scenic area, where three natural stone arches look like bridges, is a popular tourist attraction. (Xinhua/Liu Chan)