现在需要递交864 和NVC要求的其他文件。864表需要寄到Chicago,
-Who told you the I-864 needs to be sent to Chicago in your case?
但是NVC的各种表格可以email递交,是吗?
-NVC should have sent you the instructions, right? Just follow the NVC Instructions to submit these documents.
Read this website for some information:
https://travel.state.gov/content/travel/en/us-visas/immigrate/the-immigrant-visa-process.html