Workers of a wheat straw recycling company collect wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

An agricultural vehicle packs up collected wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Aerial photo taken on Nov. 29, 2019 shows wheat straw collected in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Workers of a wheat straw recycling company pack up collected wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Workers of a wheat straw recycling company collect wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Workers of a wheat straw recycling company pack up collected wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Workers of a wheat straw recycling company pack up collected wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Workers of a wheat straw recycling company collect wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province, Nov. 29, 2019. (Xinhua/Peng Zhaozhi)

Aerial photo taken on Nov. 29, 2019 shows workers of a wheat straw recycling company collecting wheat straw in the field in Jiangxiang Town of Nanchang County, Nanchang, east China's Jiangxi Province. (Xinhua/Peng Zhaozhi)