A contestant performs during a Chinese language competition in Veliko Turnovo, Bulgaria, on May 15, 2022. Bulgarian national qualifications of the 21st "Chinese Bridge," the world's major Chinese proficiency competition for foreign university students, were held here on Sunday.Photo:Xinhua

A contestant performs during a Chinese language competition in Veliko Turnovo, Bulgaria, on May 15, 2022.Photo:Xinhua

A contestant gives a speech during a Chinese language competition in Veliko Turnovo, Bulgaria, on May 15, 2022.Photo:Xinhua