SEOUL (AFP) - China's Qiao Bin on Saturday survived a stiff test from Hong Kong's Wong Wing Ki to advance to the men's singles final at the Badminton World Federation Korea Open.

Qiao defeated Wong 21-18, 21-16 as the Hong Konger, who survived a long quarter-final the previous day, could not quite dig deep enough.

"He was quicker than me today," said Wong. "I think my long quarter-final against Tian Houwei yesterday made me slightly slower".

Qiao will clash with South Korea's Son Wan Ho, who defeated veteran compatriot Lee Hyun Il 21-13, 14-21, 21-10 to secure a berth at the final.

In the women's tournament, Korea's Sung Ji Hyun made her second straight Korea Open final by routing younger team-mate Kim Hyo Min 21-5, 21-10.

Sung will meet Japan's Akane Yamaguchi, who brushed aside compatriot Minatsu Mitani, 21-17, 21-11.

Men's doubles great Lee Yong Dae and partner Yoo Yeon Seong of Korea overcame China's Wang Yilyu/Huang Kaixiang 21-11, 21-16.

The Korean pair will face Li Junhui/Liu Yuchen, who made their second Superseries final in two weeks.

The Chinese - champions at last week's Yonex Open Japan - took their time to get going against Malaysia's Goh V Shem/Tan Wee Kiong, but shot ahead in the end, 18-21, 21-15, 21-13.

China's Luo Ying and Luo Yu ruined Olympic women's doubles silver medallists Christinna Pedersen/Kamilla Rytter Juhl's quest for a second straight Superseries title.

The Luos made their first Superseries final this year with the 21-15, 17-21, 21-12 result.

The twins will now take on Olympic bronze medallists Jung Kyung Eun/Shin Seung Chan of Korea, who overpowered compatriots Chang Ye Na/Lee So Hee 23-21, 21-15 in an earlier semi-final.