welcome to mamapedia....I think....I think I need to call troll on this one!! In the off-chance it's legit?? I'll respond...
If you are Chinese - are you talking about your daughter being in the United States or somewhere else??
Are you here legally? Is your daughter here legally?? If you know the name of the company she went to work for? Call them and ask if she's still there.
If you have an address for her? Call the local police and ask for them to do a well-check visit.
If you are paying for her cell phone? Call the carrier and ask for a location as she's missing.
You can hire a private investigator. He/she will need pictures of your daughter as well as any and all information you have - company she worked for, address she lived it, e-mail, cell phone.
I just can't believe ANY mother would let a child go for 2 years....