Thai mixed doubles pair Dechapol Puavaranukroh and Sapsiree Taerattanachai defeated China's Jiang Zhenbang and Wei Yaxin 21-8, 21-17 in the quarter-finals of the US$420,000 Malaysia Masters in Kuala Lumpur on Friday.
The second-seeded Thai veterans needed just 33 minutes to finish off the world No.12 Chinese in their first ever meeting.
In Saturday's semi-finals, Dechapol and Sapsiree will face South Korea's third seeds Seo Seung-Jae and Chae Yu-Jung, who beat Indonesia's Rinov Rivaldy and Pitha Haningtyas Mentari 21-15, 22 20 in the last eight.
The Thai duo could meet compatriots Supak Jomkoh and Supissara Paewsampran in the final of the World Tour 500 event.
World No.13 Supak and Supissara defeated No.72 Marcus Ellis and Lauren Smith of England 10-21, 21-19, 21-1.
They take on fourth seeds Feng Yanzhe and Huang Dongping in the last four after the Chinese beat Japan's Kyohei Yamashita and Naru Shinoya 22-20, 11-21, 21-17.
In the women's singles quarter-finals, Thailand's eighth seed Busanan Ongbamrungphan lost to fourth seed Han Yue of China 22-20, 21-19.
Top-ranked Akane Yamaguchi defeated Canada's Michelle Li 21-11, 21-14.
Seventh seed Gregoria Mariska Tunjung of Indonesia upset second seed Wang Zhiyi from China 21-11, 21-14.
India's Pusarla V Sindhu, the sixth seed, needed three games to edge past unseeded Chinese Zhang Yiman 21-16, 13-21, 22-20.
The tournament ends on Sunday.
It will be followed by the Thailand Open, which also offers a total purse of US$420,000, next week.