Duck farmers work along the banks of the Yellow River in Pingluo County, Shizuishan City, Ningxia Hui Autonomous Region, on December 18, 2020. For more than 10 years, the farmers from Binhai County of Jiangsu Province have been farming ducks here every year after the autumn harvest. They purchase about 20,000 ducklings, vaccinate them, raise them for several months and sell them to such areas as Jiangsu, Shanghai and Beijing before New Year’s Day, generating an annual net revenue of nearly 300,000 yuan ($46,800).