With the help of science and technology, the High-tech Development Bureau of the Public Security Bureau used drones to help set up an epidemic prevention and control  Network, and worked hard to fight the epidemic prevention and control. Disinfection spray “full coverage”  Cleaning and disinfection is something that every unit must do every day since […] With the help of science and technology, the High-tech Development Bureau of the Public Security Bureau used drones to help set up an epidemic prevention and control  Network, and worked hard to fight the epidemic prevention and control. Disinfection spray “full coverage”  Cleaning and disinfection is something that every unit must do every day since Read More