My name is Jan Muhammad, and am from Gilgit Baltistan. I visited China so many times on border pass and passport for business purpose. Now I want to visit China once again for business purpose, my business counterpart is in Zhejiang Province Zhuji City, but I want to visit other provincies as well. Do I need an invitation from my business counterpart or I can get the visa without it. If I need the invitation letter from my business counterpart, is it need hard copy or e mail copy, or scan copy will fulfill the requirment.