Aerial photo taken on Nov. 27, 2018 shows karst mountains in Baise, south China's Guangxi Zhuang Autonomous Region. Covering an area of around 36,300 square kilometers and holding a population of more than 4.1 million, Baise is a major base for fruits and vegetables, also one of China's most important producers of aluminum. (Xinhua/Huang Xiaobang)