Farmers pack freshly-picked grapes for sale in Bingjiao Village, Yongqing County of north China's Hebei Province, Aug. 14, 2018. Bingjiao, a well-known village for grape planting in Yongqing County, has introduced new species and technologies for the growing of grapes in recent years. There are now over 5,000 Mu (about 333 hectares) of grape fields in the village which can yield a total value of 30 million yuan (about $4.37 million) every year. (Photo: Xinhua)

A visitor picks grapes in Bingjiao Village, Yongqing County of north China's Hebei Province, Aug. 14, 2018. Bingjiao, a well-known village for grape planting in Yongqing County, has introduced new species and technologies for the growing of grapes in recent years. There are now over 5,000 Mu (about 333 hectares) of grape fields in the village which can yield a total value of 30 million yuan (about $4.37 million) every year. (Photo: Xinhua)

A farmer carries grapes for visitors in Bingjiao Village, Yongqing County of north China's Hebei Province, Aug. 14, 2018. Bingjiao, a well-known village for grape planting in Yongqing County, has introduced new species and technologies for the growing of grapes in recent years. There are now over 5,000 Mu (about 333 hectares) of grape fields in the village which can yield a total value of 30 million yuan (about $4.37 million) every year. (Photo: Xinhua)

A farmer sells freshly-picked grapes in Bingjiao Village, Yongqing County of north China's Hebei Province, Aug. 14, 2018. Bingjiao, a well-known village for grape planting in Yongqing County, has introduced new species and technologies for the growing of grapes in recent years. There are now over 5,000 Mu (about 333 hectares) of grape fields in the village which can yield a total value of 30 million yuan (about $4.37 million) every year. (Photo: Xinhua)