In fact, there is no condition to sell things on the road in the catering car. First of all, your car can be licensed as a catering car, otherwise it will be checked by the traffic police for different purposes, and then you must apply for a health certificate to sell food. I don't know if you're talking about this dining car with a rice cooker and a diesel stove. That kind of minivan can also sell some spicy snacks, but it's not like this, and the price is much cheaper.