China's Weng Hongyang, the biggest dark horse at the BWF South Korea Open, upset world No. 8 Jonatan Christie from Indonesia to claim the men's singles title on Sunday.

This is the first time that a Chinese shuttler wins a gold medal in the men's singles at the world stage in three years.

The world No. 156 Chinese took a hard-won victory, 12-21, 21-19, 21-15, over the 2022 Swiss Open champion Christie.

The 22-year-old from Fuzhou, southeast China's Fujian Province, joined the national team in March 2018 without much international competition experience. 

He started the journey at the tournament as a substitute but became the only Chinese advancing into the semifinals.

Local favorite and the tournament's second seed An Se-young beat sixth seed Pornpawee Chochuwong of Thailand in the women's singles final after the South Korean won in two straight games, 21-17, 21-18.

The women's doubles crown went to South Korea's seventh seeds Jeong Na-eun and Kim Hye-jeong, who swept eighth seeds Benyapa Aimsaard and Nuntakarn Aimsaard of Thailand 21-16, 21-12.

Kang Min-hyuk and Seo Seung-jae of South Korea became the men's doubles champions by commanding Indonesia's fourth seeds Fajar Alfian and Muhammad Rian Ardianto 19-21, 21-15, 21-18. 

Malaysia's second seeds Tan Kian Meng and Lai Pei Jing won the mixed doubles title by smashing South Korea's fourth seeds Ko Sung-hyun and Eom Hye-won 21-15, 21-18. 

(With input from Xinhua)