Existing smoking booths were only in certain spaces, with an average size of 4 meters. It's a multi-injection type in a large booth, so it's not ventilated. It wasn't a good place for certain Targets, such as electronic cigarette smokers, female smokers and disabled smokers. The single smoking booth, which is smaller than 2 meters, is installed in alleys, restaurants and entertainment areas where damage to real-life street smoking occurs, and can protect the rights of other smokers.