Photo taken on May 31, 2016 shows a bridge of the Chongqing section of Wanzhou-Lichuan highway under construction in Chongqing, southwest China. Nearly 70 percent of the construction work of the 52-kilometer-long Chongqing section of Wanzhou-Lichuan highway has been finished. It is expected to put into operation in 2018. (Photo: Xinhua/Liu Chan)
