A man poses for a photo with two buckets of grapes in Adelaide hills, Australia, March 26, 2019. South Australia, famous for its wine making, produces about 60 percent of the wine in the country. Winemakers are busy in March, when they collect mature grapes for production of prime wines. (Photo:Xinhua)

A man conveys grapes in Adelaide hills, Australia, March 26, 2019. South Australia, famous for its wine making, produces about 60 percent of the wine in the country. Winemakers are busy in March, when they collect mature grapes for production of prime wines. (Photo:Xinhua)

Photo taken on March 26, 2019 shows grapes in Adelaide hills, Australia. South Australia, famous for its wine making, produces about 60 percent of the wine in the country. Winemakers are busy in March, when they collect mature grapes for production of prime wines. (Photo:Xinhua)

A winemaker checks grapes in Adelaide hills, Australia, March 24, 2019. South Australia, famous for its wine making, produces about 60 percent of the wine in the country. Winemakers are busy in March, when they collect mature grapes for production of prime wines. (Photo:Xinhua)

A winemaker processes grapes in Adelaide hills, Australia, March 24, 2019. South Australia, famous for its wine making, produces about 60 percent of the wine in the country. Winemakers are busy in March, when they collect mature grapes for production of prime wines. (Photo:Xinhua)

Workers convey grapes in Adelaide hills, Australia, March 26, 2019. South Australia, famous for its wine making, produces about 60 percent of the wine in the country. Winemakers are busy in March, when they collect mature grapes for production of prime wines. (Photo:Xinhua)