An aerial view shows the Nanmudu Wujiang River Bridge in Kaiyang County, Guiyang City, Guizhou Province, on July 3, 2019. In 1935, the Central Red Army led by late Chinese leaders Mao Zedong and Zhou Enlai crossed the Wujiang River, which is 120 meters wide and flanked by steep cliffs on both sides, after a three-day battle during the Long March.