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Hulukou Bridge and wiring project is located in the Jinsha river reach adjacent by Ningnan county of Sichuan province and Qiaojia county of Yunnan province, about 37Km away from the upstream of Baihe beach hydropower station dam site and the project is 3466.267m long. The main bridge adopts 158+656+145m steel truss stiffening girder suspension bridge with 25+25m approach, 20+20m reinforced concrete box girder and a total length of 746m.