2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 16 | 45.7% |
2 | United States | 9 | 25.7% |
3 | Germany | 6 | 17.1% |
4 | Korea, Republic of | 4 | 11.4% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 16 | 45.7% |
2 | United States | 9 | 25.7% |
3 | Germany | 6 | 17.1% |
4 | Korea, Republic of | 4 | 11.4% |