Wave 2 retention rates and replenishment sample sizes for non-smokers
| City | Shenyang | Shanghai | Yinchuan | Changsha | Beijing | Guangzhou |
| Wave 1 n | 196 | 204 | 214 | 203 | 218 | 224 |
| Lost | 24 | 17 | 34 | 45 | 8 | 75 |
| Retained | 172 (87.8) | 187 (91.7) | 180 (84.1) | 158 (77.8) | 210 (96.3) | 149 (66.5) |
| Replenished | 22 | 17 | 24 | 25 | 7 | 60 |