| Survey time | Survey scope | Comparative approach | Result of PPP | Relative price level (PPP exchange rate) | |
| Unite | PPP | ||||
| 1993 | 2 regions | Bilateral comparison | RMB/Hong Kong dollar | 0.47 | 63% |
| 1999 | 7 cities | Bilateral comparison and Multilateral comparison | RMB/dollar | 4.94 | 60% |
| 2005 | 11 cities | Multilateral comparison | RMB/dollar | 3.45 | 42% |
| 2009 | Beijing | Multilateral comparison | RMB/Hong Kong dollar | 0.63 | 72% |
| 2011 | Nationwide | Multilateral comparison | RMB/dollar | 3.506 | 54% |