Combo photo shows a model of Fengyu Bridge displayed at Anthropology Museum of Guangxi in Nanning, South China's Guangxi Zhuang autonomous region, May 18, 2019 (above), and a photo taken on Dec 7, 2016 showing Fengyu Bridge at Sanjiang Dong autonomous county in Liuzhou, South China's Guangxi Zhuang autonomous region. (Xinhua/Lu Boan)