Workers pile up wolfberries to be exported to Holland at a wolfberry producing base in Tongxin County, Wuzhong City, northwest China's Ningxia Hui Autonomous Region, June 22, 2018. Wolfberry has entered harvest season in Ningxia, a major base of wolfberry plantation in China. The wolfberry industry here has become a key for local villagers to lift themselves out of poverty.(Xinhua/Hou Dongtao)