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People attend the Balloon's Day Parade of the 2019 Brussels Comic Strip Festival in Brussels, Belgium, Sept. 15, 2019. The Balloon's Day Parade is a traditional show during each year's comic festival. (Xinhua/Zhang Cheng)
People attend the Balloon's Day Parade of the 2019 Brussels Comic Strip Festival in Brussels, Belgium, Sept. 15, 2019. The Balloon's Day Parade is a traditional show during each year's comic festival. (Xinhua/Zhang Cheng)