The food and grocery companies in China who are selling in supermarkets are already in the supermarkets.
EDIT: I dislike eating 'exotic' meats and discourage the practice, however there's a fine line when you enforce the ban live animal market policy. Note that it has been enacted in Wuhan when the disease started. I also support stronger regulations and animal protections on these live animal markets and am not deflecting blame from these live animal markets but straight-up banning is not the right solution.