China's Gong Zhichao swept aside Denmark's world champion Camilla Martin on Friday at the Brunei badminton world grand prix finals, making the women's singles semi-finals all-Chinese affairs.

Martin, the Danish world number six, crashed to the Chinese world number three 6-11, 7-11 in the Group C decider.

Gong's semi-final opponent Saturday will be the 1997 grand prix finals winner and world number two Ye Zhaoying, who beat South Korean Kim Ji-Hyun to top Group B.

World number one Dai Yun made short work of Japan's Yasuko Mizui 11-6, 11-8 in group A to arrange a semi-final showdown with Group D winner Zhou Mi, the Chinese world number five.

The season-ending Brunei event features the world's top 16 men's singles players, the top 12 women and the top eight doubles exponents in the men, women, and mixed disciplines.