Dear sir,
I need some information for my sister who is getting married to a Pakistani national guy living and working in Shanghai.My sister is also a Pakistani citizen. They are getting married in April. I want to know;
If she will need a Visa?
How long will the process take?
How long does it take to get a visa interview after you apply for the visa?
What documents does she need to take with her to the interview?

I would appreciate your help.
Thanks