Visitors attend the Positivus festival in the coastal town of Salacgriva, Latvia, on July 27, 2019. Positivus, known as the biggest and most important music festival in the Baltic states, is held each year in July. (Photo: Xinhua)

A girl attends the Positivus festival in the coastal town of Salacgriva, Latvia, on July 27, 2019. Positivus, known as the biggest and most important music festival in the Baltic states, is held each year in July. (Photo: Xinhua)

British band Royal Blood performs during the Positivus festival in the coastal town of Salacgriva, Latvia, on July 27, 2019. Positivus, known as the biggest and most important music festival in the Baltic states, is held each year in July. (Photo: Xinhua)