Greetings to All

I am a Pakistani national and I have got admission in Ph.D programme in Beijing, China. I have also received the admission offer letter and visa filled form from the Chinese university. I want to go to china with my family i.e. wife and daughter, regarding that i have some queries as follows:

1. How can i go with my family, i mean on which visa type i have to apply and what is the procedure to apply for my family. And

2. What about the requirements of health insurance for my family and myself, is it necessary to take health insurance policy for all of us on my student visa?

3. How much time will be required for visa processing?

4. And if i apply on L visa for my family then i learn from someone that i must required the return air ticket for my family, However i will have to apply for the extension of my family visa in china..

waiting 4 earliest possible positive response

thanks in advance

Suhaib Farhan