2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 55 | 73.3% |
2 | United States | 10 | 13.3% |
3 | Germany | 9 | 12% |
4 | Iran, Islamic Republic of | 1 | 1.3% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 55 | 73.3% |
2 | United States | 10 | 13.3% |
3 | Germany | 9 | 12% |
4 | Iran, Islamic Republic of | 1 | 1.3% |