A girl enjoys herself during the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. The four-day festival, which kicked off on June 7, attracted more than 30 ballon teams from Germany, Belgium and the Netherlands. [Photo/Xinhua]
People look at a hot air ballon during the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. [Photo/Xinhua]
People visit the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. [Photo/Xinhua]
A girl runs in front of a hot air balloon during the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. [Photo/Xinhua]
Two children are seen during the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. [Photo/Xinhua]
People prepare a hot air ballon during the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. [Photo/Xinhua]
People visit the balloon festival at Rheinaue leisure park in Bonn, Germany, on June 8, 2019. [Photo/Xinhua]
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