| District | Commune | Village | No. of surveyed households |
| Thai Nguyen city | Tan Cuong | Hong Thai 1 | 30 |
| Phuc Xuan | Trung Tam | 30 | |
| Phuc Triu | Lai Thanh | 30 | |
| Dai Tu district | La Bang | La Bang | 30 |
|
| Yen Lang | Đong Đinh | 30 |
| Dong Hy district | Trai Cai | Trai Cai 1 | 30 |
|
| Van Han | Van Han 1 | 30 |
| Total |
| 210 | |