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?
That's based on the instruction for I-864. There is link to 'where to file' to https://www.uscis.gov/i-864?. It says to mail to Chicago.
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
Based on NVC instruction, there is a checklist. It says below. So the Signed Affidavit of Support is I-864? it did not mention the form specifically. 多谢！
3. Signed Affidavit of Support(s).................... [ ] [ ] [ ]
Proof of U.S. Status.............................. [ ] [ ] [ ]
Proof of Domicile................................. [ ] [ ] [ ]
Petitioner's Civil Documents................. [ ] [ ] [ ]
........................
