| Class | Subclass | Altitude(m) | Surface cutting degree |
| Extremely high mountain |
| >5000 | >1000 |
| High mountain | High mountain | 3500 - 5000 | >1000 |
| Mid-high mountain | 500 - 1000 | ||
| Low-high mountain | <500 | ||
| Middle mountain | High-middle mountain | 1000 - 3500 | >1000 |
| Middle mountain | 500 - 1000 | ||
| Low-middle mountain | <500 | ||
| Low mountain | Mid-low mountain | 500 - 1000 | 500 - 1000 |
| Low mountain | 100 - 500 | ||
| Hills |
| <500 |
|