This aerial photo taken on Oct. 27, 2022 shows a view of Nangou Village of Yan'an, northwest China's Shaanxi Province. Photo: Xinhua

This aerial photo taken on Oct. 26, 2022 shows a view of a demonstration area for ecological agriculture in Nangou Village of Yan'an, northwest China's Shaanxi Province. Photo: Xinhua

A fruit farmer picks apples in an orchard in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

A fruit farmer picks apples in an orchard in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

Staff members package apples at an apple sorting and packaging workshop in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

A staff member puts apples into a sorting facility at an apple sorting and packaging workshop in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

This aerial photo taken on Oct. 26, 2022 shows a view of Nangou Village of Yan'an, northwest China's Shaanxi Province. Photo: Xinhua

Fruit farmers carry apples in an orchard in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

A staff member transfers packed apples in a cold storage facility in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

Staff members package apples at an apple sorting and packaging workshop in Nangou Village of Yan'an, northwest China's Shaanxi Province, Oct. 27, 2022. Photo: Xinhua

This aerial photo taken on Oct. 26, 2022 shows a view of an orchard in Nangou Village of Yan'an, northwest China's Shaanxi Province. Photo: Xinhua