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| 关一 开: 27 phrases in 16 subjects |
| Architecture | 1 |
| China | 1 |
| Commerce | 1 |
| Economy | 1 |
| Electronics | 1 |
| General | 2 |
| Geophysics | 5 |
| Lighting other than cinema | 2 |
| Navigation | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 2 |
| Project management | 1 |
| Rail transport | 2 |
| Space | 1 |
| Technology | 4 |
| Wind Energy | 1 |
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