This aerial photo taken on Dec. 17, 2023 shows a field for planting vegetables in winter in Yuanma Town of Yuanmou County, southwest China's Yunnan Province. Farmers and planting enterprises in Yunnan Province are busy harvesting vegetables to supply the market. Yunnan is an important base for growing and transporting vegetables in winter(Photo: Xinhua)

This aerial photo taken on Dec. 17, 2023 shows workers packing tomatoes at a vegetable wholesale market in Yuanmou County, southwest China's Yunnan Province. Farmers and planting enterprises in Yunnan Province are busy harvesting vegetables to supply the market. Yunnan is an important base for growing and transporting vegetables in winter.(Photo: Xinhua)

A villager picks green beans in Manda Village, Menghan Town of Jinghong, southwest China's Yunnan Province, Dec. 17, 2023. Farmers and planting enterprises in Yunnan Province are busy harvesting vegetables to supply the market. Yunnan is an important base for growing and transporting vegetables in winter.(Photo: Xinhua)

Villagers pick tomatoes at a vegetable trading center in Yuanmou County, southwest China's Yunnan Province, Dec. 17, 2023. Farmers and planting enterprises in Yunnan Province are busy harvesting vegetables to supply the market. Yunnan is an important base for growing and transporting vegetables in winter.(Photo: Xinhua)