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您的情况不需要申请新的Visa,只要您能够提供:
Nonimmigrants who have been approved for a Change of Status within the U.S. may use Automatic Revalidation, but must be able to show their Approval Notice and the expired visa for their previous category.
更多有关Automatic Revalidation的信息,可以参考美国国务院的网站
https://travel.state.gov/content/visas/en/general/automatic-revalidation.html
http://www.cbp.gov/sites/default/files/documents/auto_reva.pdf
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