If I have Spanish identity, can I apply for my mother to come over? If it can go, how long will it take? Does the mother have to be 60 years old to go?

Yes. Applying for family reunification can take 1 to 2 months if it is quick, or 4 or 5 months if it is slow. A few years ago, you could apply for status after working for 2 or 3 years, but now it seems to have changed. If you get married, you can, but it will be slower than if you have your own status. You can ask a lawyer for advice.

There are many Chinese now opening law firms