KEEP LOOKING, and..

1. Look in other geo areas including china

2. lower her expectations.

3. marry someone with greencard.

4. Look in other industries.

5. There are many reasons for her to be rejected but no one will ever say it explicitly as they are illegal: age, sex, race, etc.In the end, being rejected many times means you are not competitive enough compared to other candidates or your expectations are not realistically aligned with your experience or potential contribution perceived by others.

6. Don't ever say "I want to be a manager/boss/CEO/CTO"

7. Don't ever say "I want to start my own company"

8. Don't ever say "I'm going back to china after a few years"

9. KEEP LOOKING