参考资料
1.‘it’s the new chinese exclusion act’: how a trump order could hurt california universities.
https://www.latimes.com/california/story/2020-06-07/trump-move-to-bar-entry-of-some-chinese-graduate-students-stirs-campus-anxiety-anger2.6月1日起,美国禁止部分中国留学生和研究者入境http://www.zhishifenzi.com/depth/depth/9171.html3.21名留学生滞留海外 中转香港新加坡回国路不通http://companies.caixin.com/2020-06-05/101563338.html4.民航局重拳打击国际线倒票,航司都直销了为何还有朋友圈炒票?https://k.sina.com.cn/article_1655444627_62ac1493020014zno.html?cre=tianyi&mod=pcpager_fintoutiao&loc=33&r=9&rfunc=8&tj=none&tr=95.美国博士学位权威调查:6182名中国人去年获得学位,近8成欲留美http://www.mittrchina.com/news/4546