The procedure to open a branch in China is complex, you need a visa to enter China first, either tourist or business but with longer duration. You are required to apply for a permit about foreign capital from Chinese government, get registered and get a business license. You can submit all required documents to Chinese embassy in person. The processing for visa takes 4 working days in general. When everything is done, you can change your visa to a Z if you need. I have to say sorry for your last question, you'd better enquire a professional.