2000 - Played first events of career on ITF Circuit in China.
2001 - Played first Tour qualifying at Shanghai; won one doubles title on ITF Circuit.
2002 - Played first Tour main draw at Shanghai, falling 1r; won seven doubles titles on ITF Circuit.
2003 - QF at Tokyo [Japan Open]; fell 1r twice and in Tour qualifying six times (incl.
US Open); won five doubles titles on ITF Circuit.
2004 - Fell 1r four times and in Tour qualifying nine times (incl.
Australian Open,
Wimbledon); won one doubles title on ITF Circuit.
2005 - Won first Tour singles title at Guangzhou (won title when Llagostera Vives ret. in final w/left hamstring injury); third Chinese at the time to win a Tour singles title (preceded by Li, Zheng; since joined by Sun); reached 2r three times; fell 1r once and in Tour qualifying four times (incl.
US Open); won two Tour doubles titles; won two doubles titles on ITF Circuit.
2006 - Won six Tour doubles titles w/Zheng, incl. China's first majors at
Australian Open (d. Raymond/Stosur 26 76(7) 63 in final; saved 3mp in tie-break) and
Wimbledon (d. Ruano Pascual/Suárez in final); first Chinese ever to qualify for Tour Championships (l. first match); made doubles Top 10 debut on May 15 (rose from No.15 to No.10) and Top 5 debut on July 10 (after
Wimbledon; rose from No.7 to No.4, where she'd stay rest of season); in singles, SF at Rabat (l. to Shaughnessy); reached 2r three times (incl.
Australian Open); fell 1r 12 times (incl. other three majors) and in Tour qualifying six times; played all four majors in a season for first time; made Top 100 debut on January 16 (rose from No.101 to No.88).
2007 - First Top 100 season in singles; SF twice, at Toronto (was alternate into qualifying; l. to Henin) and Bangkok (l. to Chan); reached 2r three times; fell 1r seven times (incl.
Wimbledon,
US Open) and in Tour qualifying twice (incl.
Australian Open); won five Tour doubles titles.
2008 - SF at Bangalore (l. to Schnyder); made Top 50 debut afterwards on March 10 (rose from No.54 to No.43), reaching career-high No.40 on May 5 (fell out of Top 100 by end of season); reached 2r four times; fell 1r nine times (incl. all four majors, Olympics) and in Tour qualifying once; won two Tour doubles titles; won bronze at Olympics (w/Zheng; l. to Medina Garrigues/Ruano Pascual in SF, then d. Bondarenko/Bondarenko in bronze medal match).
2009 - Strong doubles results, winning 16th Tour doubles title at Los Angeles (w/Chuang) and finishing runner-up at Warsaw (w/Zheng; l. to Kops-Jones/Mattek-Sands in final); in singles, fell 1r three times and in Tour qualifying 10 times (incl.
Australian Open); member of Chinese Fed Cup team that l. to Russia 5-0 in World Group 1r (went 0-3).