非常感謝！有些小問題不知道是否方便？
1，I-129F是我本人在美國申請嗎？
-Yes. Read the Instructions.
2，如果批準，我要把文件寄回國內，
-The USCIS will send the approved I-129F to the National Visa Center (NVC), and the NVC will send the paper-work to the US Consulate in Guangzhou, CHINA and the, the Consulate will contact your fiancee for the visa interview. NVC may also will contact you for some extra documents or visa application fee during the processing.
我還用回去陪同簽證嗎？
-Not need.
