Farmers pick honeydew melons in Foluo Town of Ledong County, south China's Hainan Province, Dec. 9, 2017. The total sales of Ledong County increased from 800 million of last year to 1.8 billion Yuan during the Hainan International Winter Trade Fair of Tropical Agricultural Products among which honeydew melons account for 730 million Yuan.Photo: Xinhua

Workers transport honeydew melons in Foluo Town of Ledong County, south China's Hainan Province, Dec. 9, 2017. The total sales of Ledong County increased from 800 million of last year to 1.8 billion Yuan during the Hainan International Winter Trade Fair of Tropical Agricultural Products among which honeydew melons account for 730 million Yuan. Photo: Xinhua

Farmers package honeydew melons in Foluo Town of Ledong County, south China's Hainan Province, Dec. 9, 2017. The total sales of Ledong County increased from 800 million of last year to 1.8 billion Yuan during the Hainan International Winter Trade Fair of Tropical Agricultural Products among which honeydew melons account for 730 million Yuan. Photo: Xinhua

Farmers package honeydew melons in Foluo Town of Ledong County, south China's Hainan Province, Dec. 9, 2017. The total sales of Ledong County increased from 800 million of last year to 1.8 billion Yuan during the Hainan International Winter Trade Fair of Tropical Agricultural Products among which honeydew melons account for 730 million Yuan. Photo: Xinhua