Visitors enjoy ice cream at the Prague Ice Cream Festival in Prague, the Czech Republic, June 2, 2019. The fifth Prague Ice Cream Festival was held in Prague on Sunday. The festival, established in 2015, is currently the largest of its kind in Central Europe. (Photo: Xinhua)

A worker makes ice cream at the Prague Ice Cream Festival in Prague, the Czech Republic, June 2, 2019. The fifth Prague Ice Cream Festival was held in Prague on Sunday. The festival, established in 2015, is currently the largest of its kind in Central Europe. (Photo: Xinhua)

A visitor gets an ice cream at the Prague Ice Cream Festival in Prague, the Czech Republic, June 2, 2019. The fifth Prague Ice Cream Festival was held in Prague on Sunday. The festival, established in 2015, is currently the largest of its kind in Central Europe. (Photo: Xinhua)

A worker makes ice cream at the Prague Ice Cream Festival in Prague, the Czech Republic, June 2, 2019. The fifth Prague Ice Cream Festival was held in Prague on Sunday. The festival, established in 2015, is currently the largest of its kind in Central Europe. (Photo: Xinhua)

A visitor gets an ice cream at the Prague Ice Cream Festival in Prague, the Czech Republic, June 2, 2019. The fifth Prague Ice Cream Festival was held in Prague on Sunday. The festival, established in 2015, is currently the largest of its kind in Central Europe. (Photo: Xinhua)

A worker makes ice cream at the Prague Ice Cream Festival in Prague, the Czech Republic, June 2, 2019. The fifth Prague Ice Cream Festival was held in Prague on Sunday. The festival, established in 2015, is currently the largest of its kind in Central Europe. (Photo: Xinhua)