2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 21 | 43.8% |
2 | United States | 15 | 31.2% |
3 | Germany | 11 | 22.9% |
4 | Republic of Korea | 1 | 2.1% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 21 | 43.8% |
2 | United States | 15 | 31.2% |
3 | Germany | 11 | 22.9% |
4 | Republic of Korea | 1 | 2.1% |