Zhang Chao (2nd R, front), a plant expert, teaches researches how to take records of wild azalea in Wolong, southwest China's Sichuan Province, May 22, 2015. A scientific investigation on wild azalea in the Hengduan Mountains concluded on Tuesday, in which researchers has found, recognized and taken photos of 15 kinds of wild azalea in four days on an altitude of 2,000 to 4,000 meters on Hengduan Mountains of Sichuan Province. (Xinhua/Shen Bohan)
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