2. Cities with low security levels are prone to disasters and are easily infected by disasters. Cities with disasters will lower their security levels every day, and cities with disasters will lose some corresponding buildings.
Take the locust plague as an example. If the city of Gong 'an 100 suffers from locust plague, it will lose 5-10 points per round (10 days). If you don't patrol, the public security will drop to a dangerous level, the farmland in the city will automatically explode, and the locust plague will last for a long time.