Photo taken on Dec. 1, 2021 shows sweet potato chips in Quanfan Village of Zhaojia Township in Zhuji, east China's Zhejiang Province. Sweet potato planting area in Quanfan Village has reached more than 1,000 mu (about 67 hectares). Every winter, local villagers will make sweet potato delicacies in different ways, among which traditional sweet potato chip is a popular one. (Xinhua/Xu Yu)