For everyone, but especially for tourists who come to San Francisco and want to have a good day here, they may have a feeling of disgust towards the city when 'They see illegal drug use in public. What's more, such a phenomenon can threaten residents' confidence in their personal safety, given that much of the current spread of epidemics is due to the abuse of dangerous and intravenous drugs. In general, if this problem is left unaddressed, it can worsen over time and lead to more serious problems, such as higher rates of crime and suicide in our society. I hope our government can do its best to take more action on this issue. They must cut off the head of the snake because it is important to control the production, transportation and sale of drugs in our city. Furthermore, they should direct law enforcement activities not only toward drug importers and users, but also toward local dealers and suppliers. I hope there will be fewer drug users and our city will become better, monitored and controlled by a stricter government.