I want to open a shop in Nanning and connect a hose to help people wash their cars. I don't know if it's ok.

The key to taxi washing is location. If you are in the city, the urban management will catch it. I suggest that there should be a snack stand in the fringe of urban and rural areas or in remote places. In this way, your brother can have supper while washing the car. Besides, your price must be one yuan cheaper than others'. Although it's only one yuan, your brother is good at calculating. It's ok to get a card, but it's difficult. After all, your brother washed it once. If you have an acquaintance with his brother, you can pass it on by word of mouth.