In the women's draw, Malaysia's Goh Jin Wei advanced to the last four with a straight games victory over Thailand's Jindapon Nichaon, winning 21-16 23-11 in 39 minutes.
Indonesia's Hanna Ramadini needed three games to book her spot in the final four with a 21-15, 11-21 21-14 win over Singapore's Liang Xiaoyu.
Vietnam's Vu Thi Trang confirmed her participation in the semi-finals after coming through a close battle with Indonesia's Lindaweni Fanetri, winning 21-19, 9-21, 21-17.
In the men's draw, Malaysian ace Chong Wei Fen through advanced to the last four after surviving a huge scare from Indonesia's Jonatan Christie.
Christie won the first game 22-20 before the Malaysian number one bounced back, winning the next two games 21-19 21-18 in a match that lasted all of 65 minutes.
His Malaysian counterpart Mohamad AB Latif also advanced thanks to a three-game victory over Thailand's Boonsak Ponsana in another tight match, winning 22-20, 19-21, 21-19.
In the other quarter-finals, Yew Kean Loh beat Chanmara Tep 21-7 21-7, while T Saensomboonsuk beat Zi Liang Wong 21-8, 17-21, 21-13.