Thailand's Supanida Katethong reached the women's singles semi-finals of the US$210,000 Princess Sirivannavari Thailand Masters at Nimibutr Stadium yesterday.
The home star, ranked No.25 in the world, comfortably beat No.47 Sim Yu-Jin of South Korea in 33 minutes in the quarter-finals of the Super 300 tournament.
She meets seventh seed Zhang Yiman of China in the last four today.
The world No.18 Chinese defeated Taiwan's Pai Yu-po 21-16, 22-20 in the last eight.
Fourth seed Han Yue of China defeated sixth seed Line Hojmark Kjaersfeldt of Denmark 21-13, 21-10.
She will next face Taiwan's Hsu Wen-chi who upset eighth seed Im Ga-eun of South Korea 17-21, 21-14, 21-16.
In the women's doubles, Thai sisters Benyapa and Nuntakarn Aimsaard beat Rui Hirokami and Yuna Kato of Japan 22-20, 21-16.
They will take on China's Tan Ning and Xia Yuting who beat South Korea's Lee Yu-Lim and Shing Seung-Chan 21-16, 21-16.
In the quarter-finals of the men's singles contest, Taiwan's Lin Chun-yi stunned fifth seed Kenta Nishimoto of Japan 21-12, 21-11.
The Taiwanese faces China's Shi Yuqi, who beat third seed Lee Cheuk Yiu of Hong Kong 21-9, 21-11, in the semi-finals.
Fourth seed Ng Ka Long Angus of Hong Kong defeated eighth seed Ng Tze Yong of Malaysia 21-14, 22-20.
In the other match, sixth seed Li Shifeng from China saw off India's Sai Praneeth B 21-17, 21-23, 21-18.
In the men's doubles, Thailand's Tanadon Punpanich and Wachirawit Sothon lost to Leo Rolly Carnando and Daniel Marthin of Indonesia 21-15, 21-19.