持有效美国签证为什么还会被拒绝入境？CBP二次检查到底查什么？｜Valid Visa, Still Denied Entry at the U.S. Border?

很多人以为，只要美国签证还有效，就一定可以顺利入境。其实，签证只是申请入境的资格，真正决定你能不能进入美国的是机场口岸的CBP官员。本期我们结合近期中国学者在西雅图机场被拒绝入境的新闻，讲清楚美国签证、入境审查、二次检查、手机检查、敏感专业、访问学者和留学生入境风险。无论你是F-1学生、J-1访问学者、B1/B2旅客，还是经常往返美国的华人家庭，都应该提前了解这些规则。 Many people believe that having a valid U.S. visa guarantees entry into the United States. In reality, a visa only allows you to apply for admission at a U.S. port of entry. The final decision is made by CBP officers at the airport. In this video, we discuss why travelers with valid visas may still be denied entry, using the recent Seattle airport incident involving Chinese scholars as an example. We explain secondary inspection, phone and laptop checks, sensitive research fields, student and scholar risks, and what travelers should prepare before entering the U.S.