回复：回复：Apply for K1 visa.

非常感谢！有些小问题不知道是否方便？

1，I-129F是我本人在美国申请吗？

-Yes. Read the Instructions.

2，如果批准，我要把文件寄回国内，

-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.

 我还用回去陪同签证吗？

-Not need.