| A Theory of Multi-perspective Defocusing Recent countries visiting this post |  |
 | 10 | United States |
 | 3 | |
 | 3 | China |
 | 3 | Russian Federation |
 | 1 | Turkey |
| A Theory of Multi-perspective Defocusing Recent countries visiting this post | |
| 10 | United States |
| 3 | |
| 3 | China |
| 3 | Russian Federation |
| 1 | Turkey |