Visa for stepdaughter

Hello,
I am being offered a ver good job in Beijing, but I am worry about one thing. I am married and I have to kids with my spouse, but she also has a daugther, which effectively makes her my stepdaughter. Will I be able to apply for a S1 or S2 for my stepdaughter (she is 11 years old) She was 8 years old when I married my wife. Thank you for the help!