Photo taken on Oct. 15, 2017 shows a rainbow across the sky in Hani and Yi Autonomous County of Ning'er, Pu'er City, southwest China's Yunnan Province. Pu'er, a city in southwest Yunnan, has been endeavoring to reduce its poverty-stricken population in recent years. In total 527,000 people have overcome poverty in the past five years. By August of 2017, the impoverished in Pu'er has been reduced to 358,000. (Xinhua/Lin Yiguang)