Career
Zheng and Sang also secured the winning point against Denmark in the final of the 2004 Thomas Cup, to clinch China"s first men"s world team title since 1990. Most of his international titles, however, have come in mixed doubles. Zhang and Gao were silver medalists behind Indonesia"s Nova Widianto and Lilyana Natsir at the 2007 BWF World Championships in Kuala Lumpur.
They were upset in the round of 16 at the 2008 Beijing Olympics by former world champions Nathan Robertson and Gail Emms.
Zheng currently plays in the Chinese Badminton league with former teammate Bao Chunlai.