2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 20 | 57.1% |
2 | Germany | 10 | 28.6% |
3 | United States | 3 | 8.6% |
4 | Korea, Republic of | 2 | 5.7% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 20 | 57.1% |
2 | Germany | 10 | 28.6% |
3 | United States | 3 | 8.6% |
4 | Korea, Republic of | 2 | 5.7% |