Ptychobarbus kaznakovi, a cyprind fish species, is observed in the drainage region of the Lancang River's headwaters in Yushu, northwest China's Qinghai Province, July 1, 2014. A recent biodiversity research participated by a number of scientists and wildlife photographers has recorded 370 species in the headwaters drainage region of the Lancang River, or the Mekong. [Photo/Xinhua]