Weng Hongyang of China hits a return during the men's singles final match against Jonatan Christie of Indonesia at the BWF Korea Open Badminton Championships 2022 in Suncheon, South Korea, April 10, 2022. (JAMES LEE / XINHUA)

SEOUL - China's Weng Hongyang upset world No 8 Indonesian Jonatan Christie to claim the men's singles title at BWF South Korea Open in Seoul on Sunday.

Weng Hongyang took a hard-won victory, 12-21, 21-19, 21-15, over the 2022 Swiss Open champion Christie

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

Local favorite and the tournament's second seed An Se-young beat sixth seed Pornpawee Chochuwong of Thailand in the women's singles final as 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.

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Weng Hongyang of China attends the awarding ceremony after winning the men's singles final match against Jonatan Christie of Indonesia at the BWF Korea Open Badminton Championships 2022 in Suncheon, South Korea, April 10, 2022. (JAMES LEE / XINHUA)

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

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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. 

Jonatan Christie of Indonesia hits a return during the men's singles final match against Weng Hongyang of China at the BWF Korea Open Badminton Championships 2022 in Suncheon, South Korea, April 10, 2022. (JAMES LEE / XINHUA)

Weng Hongyang of China hits a return during the men's singles final match against Jonatan Christie of Indonesia at the BWF Korea Open Badminton Championships 2022 in Suncheon, South Korea, April 10, 2022. (JAMES LEE / XINHUA)