What are the causes and consequences of customers being charged 20 yuan air conditioning fees for exposure to meals? Who do you support?

The man offered to pay for the air conditioner, but he didn't pay later. It broke out on the internet. I don't think that person or the shopkeeper supports it. The shopkeeper should have enjoyed quality service when he went to the store to spend money. Do you eat hot food without air conditioning? If a man asks for his own money, he must fulfill his promise. It is unreasonable for the store to charge for air conditioning.