You need to apply for separate tourist visas to Mainland China and HK. But you may required documents if you want to ship goods for export. You can apply it at Chinese embassy or consulate, beineg noted that you are required to go to the one according their consular district and where you reside. The requirements for China visa application are a valid passport valid for more than 6 months with 2 blank visa pages, one passport photo, an application form, hotel reservation and round trip air ticket, your work permit or residence permit in France.