Visitors queue to buy comic books during the annual Comic Strip Festival in central Brussels, Belgium, on Sept. 14, 2018. Started in 2010, the comic festival attracts visitors and comic artists from across the world every year. This year the festival will last for three days, featuring comic book fairs, Balloon's Day Parade, conferences, screenings, and signings for comic fans. (Xinhua/Zheng Huansong)