Thank you for reaching out to us again.
The conditions for family reunification depend on the type of residence permit a person holds (we discussed a similar situation here).
To give you more detailed information, we might need the section of the law your residence permit was issued accordingly.
In general, I would always recommend to get individual advice and support by a migration counseling office or a lawyer. The family reunification procedure can get complicated and there are many details to consider. Please let us know if you need help in finding a counseling center in your area.
All the best,