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例如从芝加哥入境，或者明城入境，有什么需要特别注意的不？

-Nohting special. Don't open the envelop the Consulate officer gave to you and present it to the CBP officer at the port of entry. Also, you had better pay the immigrant fee before leaving China if you don't pay it yet. See:

https://www.uscis.gov/file-online/uscis-immigrant-fee

提前谢谢啦。