China launches survey of endangered porpoises in Yangtze River

Two scientific survey ships leave for the upper reaches of the Yangtze River from Wuhan in central China's Hubei Province on Nov. 10, 2017. China on Friday launched its first survey of endangered finless porpoises in five years, to monitor their living conditions in moves to better rehabilitate their habitat in the Yangtze River. (Xinhua/Xiong Qi)