變更

以上只是一般性的解释，具体 Unlawful Presence 和后果，详见 https://www.uscis.gov/laws-and-policy/other-resources/unlawful-presence-and-bars-to-admissibility 若有疑问，请咨询律师。因为涉及到禁止入境美国的问题，请格外慎重。如果有不理解的地方，千万不要想当然，而是咨询专业人士。

按照 INA 222(g) Nonimmigrant visa void at conclusion of authorized period of stay

(1) In the case of an alien who has been admitted on the basis of a nonimmigrant visa and remained in the United States beyond the period of stay authorized by the Attorney General, such visa shall be void beginning after the conclusion of such period of stay.