Workers clean the century-old Zhongshan bridge over the Yellow River in Lanzhou, northwest China's Ganxu Province, Sept. 6, 2022. (Photo: China News Service/Li Yalong)
Workers clean the century-old Zhongshan bridge over the Yellow River in Lanzhou, northwest China's Ganxu Province, Sept. 6, 2022. (Photo: China News Service/Li Yalong)
Workers clean the century-old Zhongshan bridge over the Yellow River in Lanzhou, northwest China's Ganxu Province, Sept. 6, 2022. (Photo: China News Service/Li Yalong)
Workers clean the century-old Zhongshan bridge over the Yellow River in Lanzhou, northwest China's Ganxu Province, Sept. 6, 2022. (Photo: China News Service/Li Yalong)