Spanning the Nanpan River in Mile Country and Qiubei Country, Honghe Prefecture, Yunnan, it is a deck and steel tube arch railway bridge (outsourced concrete works) with its main span being 416 metres, and arch height being 99 meters; among other things, the structure at 65 meters of the side span is of concrete structure; the main arch of the mid-spa**** **** **** composite segment of steel tube arch and concrete; the main arch adopts 2-deck & 6-tube uniform section arch rib; the bridge ranks among the best of its kind in the world in terms of work quantities.