Can I go to the hospital to sell sleeping bags?

This kind of behavior is not allowed.

Hospitals usually provide basic medical equipment and supplies, such as beds, sheets and quilts, to meet the basic needs of patients. In addition, hospitals need to maintain a hygienic and safe environment to prevent cross-infection and other potential health risks. Selling personal items such as sleeping bags may increase the difficulty of health management, so you can't go to the hospital to sell these items.