| Value | Category |
|---|---|
| 0 | |
| 1 | Poor physical facilites |
| 2 | Be provided with not enough necessry equipment |
| 3 | The living standard of teachers are too low |
| 4 | Limited school budget |
| 5 | Not enough space/table and chair |
| 6 | Low quality of the teacher |
| 7 | Others |
| 9 | Don't know |
| Sysmiss |