Combination photo shows an aerial view of the transformed Tianshan Park of Liuzhou City on Aug. 11, 2015 (upper) and two pigeons flying over a smelly pool at the same park on March 30, 2013 (lower), in south China's Guangxi Zhuang Autonomous Region. The Tianshan Park, formerly a smelly pool, has 28,000 square meters of greenbelt after transformation. (Xinhua/Li Hanchi)
