A visitor tastes ice wine during an ice wine festival in Ji'an City, northeast China's Jilin Province, Dec. 9, 2019. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

Workers destem frozen grapes at a winery in Ji'an City, northeast China's Jilin Province, Dec. 9, 2019 A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

A visitor tastes frozen grapes in a grape yard in Ji'an City, northeast China's Jilin Province, Dec. 9, 2019. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

Photo taken on Dec. 9, 2019 shows a view of a grape yard at the valley of Yalu River in Ji'an City, northeast China's Jilin Province. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

Photo taken on Dec. 9, 2019 shows a view of a grape yard at the valley of Yalu River in Ji'an City, northeast China's Jilin Province. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

A staff member introduces an ice wine to customers during an ice wine festival in Ji'an City, northeast China's Jilin Province, Dec. 9, 2019. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

Photo taken on Dec. 9, 2019 shows a view of a grape yard at the valley of Yalu River in Ji'an City, northeast China's Jilin Province. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)

Photo taken on Dec. 9, 2019 shows the opening ceremony of an ice wine festival in Ji'an City, northeast China's Jilin Province. A five-day ice wine festival kicked off on Monday in Ji'an. (Xinhua/Luo Yuan)