The 28-year-old eased to a 21-17, 21-15 victory over Chinese Taipei’s Hsueh Hsuan Yi and now faces a last-four encounter with India's Parupalli Kashyap, a 18-21, 21-8, 21-16 winner over sixth seed Jeon Hyeok Jin of South Korea.

Compatriot Sung Ji Hyun is through to the semi-finals of the women’s singles after she overcame China’s Chen Xiaoxin 21-12, 21-15.

Next up for her is a meeting with fellow home favourite Ga Eun Kim, who defeated eighth seed Chia Hsin Lee of Chinese Taipei 22-20, 21-18 in the last eight.

Men’s doubles top seeds Yang Lee and Jhe-Huei Lee of Chinese Taipei continued to justify their standing with a convincing 21-14, 21-10 win over seventh seeds Hiroyuki Saeki and Ryota Taohata of Japan.

The same could be said of the highest-ranked women’s doubles pairing as South Korea’s Jung Kyung Eun and Shin Seung Chan beat Japan’s Koharu Yonemoto and Shiho Tanaka 21-13, 21-15.

In the mixed doubles, top seeds Ko Sung Hyun and Kim Ha Na defeated fellow South Koreans Kang Ji Wook and Eom Hye Won 15-21, 21-19, 21-18.

Arguably the most surprising result of the day came in the men’s singles with third seed Lee Dong Keun of South Korea falling to a 19-21, 16-21 defeat at the hands of unseeded Daren Liew of Malaysia.

The biggest casualty from the women's singles competition was fourth seed Ayumi Mine of Japan, losing 13-21, 5-21 to unseeded Jang Mi Lee of South Korea. 

Action at the BWF Masters, a Grand Prix Gold level event, is due to continue tomorrow.