Aerial photo taken on Sept. 22, 2020 shows greenhouses of jujube planting in Xiaopo Village of Dali County, northwest China's Shaanxi Province. (Xinhua/Zhang Bowen)

A staff member weighs a basket of harvested winter jujubes at a specialized farmer cooperative in Xiaopo Village of Dali County, northwest China's Shaanxi Province, Sept. 22, 2020. (Xinhua/Zhang Bowen)

A villager picks winter jujubes at a greenhouse in Xiaopo Village of Dali County, northwest China's Shaanxi Province, Sept. 22, 2020. (Xinhua/Zhang Bowen)