A new "City Brain" urban management system that can automatically generate alerts when danger is spotted was launched in Putuo District Thursday. Some 100,000 Internet of Things devices, including sensors and monitors, have been put in place across the district. They are used in every aspect of urban management from public security to market supervision and sanitation. Historical buildings have had sensors installed, so that damage can be detected as it occurs. Data collected is transmitted to the “Putuo City Brain” system which informs officials of what's happening through their mobile phones, part of the efforts to develop a smart city.