China Visa and document, money need for stay one week in china

I have to come to china to inspect factory as I would to import to india women sanitary napkin and baby diaper. This is first time I am traveling to abroad from india. how to get the travel visa for business trip to china. Is it require 3years income tax return statement to applying visa and how much money need to visit china to stay one week in three different place 1) shandong, 2) fujian 3)