I want to know:
1. What do I need to prepare now when his PD is current ? I know I need to prepare I-864, what other forms do I need ? Do I submit I-864 here or give it to my sister ?
2. For my sister in China, what documents does she need to prepare ?
Will she need to take them at the interview or should she send them to me , then I submit in US ?
Thanks for advices.