Competition Record
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
| 2005 | Asian Championships | Incheon, South Korea | 1st | 400 m | 46.04 |
| 1st | 4x400 m relay | 3:03.51 | |||
| 2006 | World Junior Championships | Beijing, China | 7th | 400 m | |
| 8th | 4x400 m relay | ||||
| World Cup | Athens, Greece | 7th | 4x400 m relay | ||
| Asian Games | Doha, Qatar | 4th | 400 m | 46.47 | |
| 4th | 4x400 m relay | 3:07.07 | |||
| 2007 | World Championships | Osaka, Japan | – | 400 m | DNF |
| 2008 | Olympic Games | Beijing, China | 43rd (h) | 400 m | 46.39 |
| 2009 | Universiade | Belgrade, Serbia | 1st | 400 m | 45.68 |
| 3rd | 4x400 m relay | 3:06.46 | |||
| World Championships | Berlin, Germany | 38th (h) | 400 m | 46.83 | |
| Asian Championships | Guangzhou, China | 2nd | 400 m | 46.60 | |
| 1st | 4x400 m relay | 3:04.13 | |||
| 2010 | Asian Games | Guangzhou, China | 2nd | 400 m | 45.32 |
| 2nd | 4x400 m relay | 3:02.43 | |||
| 2011 | Asian Championships | Kobe, Japan | 3rd | 400 m | 46.38 |
| 3rd | 4x400 m relay | 3:04.72 | |||
| World Championships | Daegu, South Korea | 20th (sf) | 400 m | 46.11 | |
| 13th (sf) | 4x400 m relay | 3:02.64 | |||
| 2012 | Olympic Games | Beijing, China | 28th (h) | 400 m | 46.01 |
| 12th (h) | 400 m | 3:03.86 |
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