Aerial photo taken on March 17, 2016 shows watermelon fields in Youjiang District of Baise, south China's Guangxi Zhuang Autonomous Region. Due to harsh stony desertification, people from dozens of counties and districts in Guangxi had long been poverty stricken. Recent years, a comprehensive environmental control program has been carried out to control stony desertification for poverty alleviation purposes. (Xinhua/Zhang Ailin)