A child tries acrobatics with the help of an instructor during the Surf Art Festival in Athens, Greece, on July 14, 2019. The Surf Art Festival is a three-day festival dedicated to the art of living and surfing. (Photo: Xinhua)

People perform acrobatics during the Surf Art Festival in Athens, Greece, on July 14, 2019. The Surf Art Festival is a three-day festival dedicated to the art of living and surfing. (Photo: Xinhua)

People perform acrobatics during the Surf Art Festival in Athens, Greece, on July 14, 2019. The Surf Art Festival is a three-day festival dedicated to the art of living and surfing. (Photo: Xinhua)