2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 19 | 51.4% |
2 | United States | 10 | 27% |
3 | Germany | 6 | 16.2% |
4 | Korea, Republic of | 2 | 5.4% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 19 | 51.4% |
2 | United States | 10 | 27% |
3 | Germany | 6 | 16.2% |
4 | Korea, Republic of | 2 | 5.4% |