Requirements to sponsor stepmother to get her green card

cw2003

New Member
I have a question about sponsoring my stepmother to get her green card. I have been in the US for 10 years and I will get naturalized next year. My dad got married after my mom passed away when I was at my early 20th. My dad and my stepmother live in China and have never visited me. I want to sponsor them to get their green cards after I become a citizen. My questions are:

1. What are the requirements for me to sponsor my stepmother?
2. If I cannot sponsor her, how can she eventually get her green card?
3. If my dad gets his green card, can my stepmother still get her temporary visa to visit me?
4. Does my stepmother have a higher chance of getting her visitor visa when my dad's green card petition is in process, or after my dad gets his green card?

Thanks!
 
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