Students perform during the 2018 "Chinese Bridge" Chinese proficiency competition for Swedish Secondary School Students and College Students in Stockholm, Sweden, on April 15, 2018. The 2018 "Chinese Bridge" Chinese proficiency competition for Swedish Secondary School Students and College Students was held here on Sunday. (Xinhua/Shi Tiansheng)

Students perform during the 2018 "Chinese Bridge" Chinese proficiency competition for Swedish Secondary School Students and College Students in Stockholm, Sweden, on April 15, 2018. The 2018 "Chinese Bridge" Chinese proficiency competition for Swedish Secondary School Students and College Students was held here on Sunday. (Xinhua/Shi Tiansheng)