Staff work in the farm in Saibei management district of Zhangjiakou, north China's Hebei Province, July 9, 2020. More than 3,300 hectares of farm crops, including potatoes, carrots and livestock fodder, have been planted in Zhangjiakou's Saibei management district as the local authorities constantly deepen the reform in land reclamation system and promote the development of modern agricultural cluster. (Xinhua/Zhu Xudong)