Question regarding Supporting Documents for Tourist Visa

We are an American family living in Paris, France and hoping to travel to China as tourists this summer. In addition to requesting our airplane reservations and hotel bookings, it appears that the Chinese Visa Application Service Center is requesting supporting documents called "Insurance in PRC" and "Work Certificate, Income Certificate, or certificate of school in France." Can anyone explain to me what documents are acceptable as proof of insurance, and what the work or income certificate must describe? Thank you!