What form do I need for Chinese Visa? Can I apply 2 months prior to entering China?

You are supposed to provide a filled-out application form affixed with a passport-style photo, passport and its photocopy, round trip air tickets and hotel reservation for the application. You can apply 2 months prior to entering China. If your mother-in-law is not required to go to the visa office in person, you can submit her application with yours on her behalf.