From English source
China's Gong Ruina retains winning form in badminton's China Open
SHANGHAI (China) Nov 14 - Top seed Gong Ruina triumphed in the women's singles quarterfinals of the US$250,000 China Open badminton championship on Friday with a three-set victory over compatriot Chen Lanting.
Gong, also the defending tournament champion, was forced to fight hard for the 11-4, 7-11, 11-7 win, while second-seeded Zhang Ning, also of China, went down in three sets to sixth seed Xie Xingfang, 6-11, 11-8, 13-10.
Third seed Zhou Mi of China had an easier time, dispatching Pi Hongyan of France 11-0, 11-5.
Fourth seed Wang Chen of Hong Kong defeated Mia Audina Tjiptawan of the Netherlands 11-8, 11-5.
In doubles play, the first-seeded duo of Yang Wei and Zhang Jiewen of China defeated countrywomen Zhang Dan and Zhang Yawen, 15-12, 15-11. Second seeds Wei Yili and Zhao Tingting defeated Du Jing and Yu Yang, 7-15, 15-6, 15-5, in another all-Chinese showdown.
China's third seeds, Gao Ling and Huang Sui, had a walkover victory over Rikke Olsen and Ann-Lou Jorgensen of Denmark, while fourth seeds Tjiptawan and Lotte Bruil-Jonathans of the Netherlands fell to eighth-seeded Hwang Yu-mi and Lee Hyo-jung of South Korea, 15-11, 15-2.
In men's doubles, Danish first seeds Lars Paaske and Jonas Rasmussen defeated the English duo of Nathan Robertson and Anthony Clark, 15-8, 15-2.
Fourth-seeded Fu Haifeng and Cai Yun of China triumphed over Indonesia's Candra Wijaya and Halim Haryanto 15-2, 15-5, while the third seeds, South Koreans Ha Tae-kwon and Kim Dong-moon, fell to unseeded Malaysians Choong Tan Fook and Lee Wan Wah 15-2, 15-11. Cheng Rui and Wang Wei beat Sang Yang and Zheng Bo 8-15, 17-15, 15-8 in the final event, another all-Chinese affair.
In men's singles play on Thursday, top seed Chen Hong of China suffered a shocking defeat at the hands of former Danish world No. 1 Peter Gade.
Chen, the world No. 1 who has complained of injury, took a 10-0 lead in the first set but then lost his composure as the 11-seeded Dane found his game. Despite leading 14-6, Chen lost the set 17-16 then dropped the second 15-4.
Chinese world champion Xia Xuanze overcame back problems to win a three-set victory against Malaysian newcomer Lee Chong Wei, 17-16, 10-15, 15-12. - AP