People visit Prowein in Dusseldorf, Germany

A visitor sniffs at a glass of wine at the tasting area of the Prowein in Dusseldorf, Germany, on March 17, 2019. The International Trade Fair for Wines and Spirits, namely Prowein, kicked off here Sunday in Dusseldorf. Some 6,900 exhibitors from around the world attended the three-day event. (Xinhua/Lu Yang)