| No. | Region | Before 2020 | 2020 | Total |
| 1 | Northeast China | 10 | 0 | 10 |
| 2 | North China | 16 | 5 | 21 |
| 3 | East China | 13 | 6 | 19 |
| 4 | Central China | 28 | 6 | 34 |
| 5 | South China | 12 | 1 | 13 |
| 6 | Southwest China | 13 | 9 | 22 |
| 7 | Northwest China | 10 | 4 | 14 |
| Total | 102 | 31 | 133 | |