Women's second seed Sun Yu reached the quarter-finals of the Jeonju Victor Korea Masters on Thursday after beating South Korea's Koh Eun Byeol in straight games.
The Chinese star was too strong for the unseeded Koh winning 21-15, 21-7 in 39 minutes to set up a clash with Japanese sixth seed Kaori Imabeppu, who got past Lee Jang Mi of South Korea 21-18, 21-19.
In other women's singles matches, South Korean third seed Bae Yeon Ju got past unseeded Ayumi Mine of Japan 21-12, 21-9 while South Korean qualifier Kim Ga Eun caused an upset by beating Taiwanese eighth seed Cheng Chi Ya 21-17, 21-17.
In another upset, the Unseeded Kano Ito of Japan beat South Korean fifth seed Kim Hyo Min 22-20, 21-17 and fourth seed Sayaka Sato of Japan got past South Korean qualifier Kim Hyang Im 21-14, 21-17.
Shen Yaying bruised past Taiwan's Chiang Mei Hui 21-18, 21-14 and Chen Hsiao Huan of Taiwan had little trouble beating Australia's Hsuan-Yu Wendy Chen 21-10, 21-19.