Globally pioneering, Weflying has created a ducted fan propulsor based tethered high-altitude firefighting unmanned aerial vehicle (UAV). It is a highly integrated product of high thrust ducted fans with a firefighting truck ground carrier. As so confined within the firefighting truck size (10*2.55*4 meters), this UAV can ensure arrival at a fire spot in the first place to secure instantaneous engagement and rescue effectiveness. It also has strong and endurable firefighting and rescue capabilities to rapidly ascend to 100 meters, meanwhile discharge a spray of fire extinguishing liquid at a continuous volume flow rate of 30L/s. As will be the next-generation main firefighting equipment, this product can thoroughly resolve the global fire rescue challenge for high-rise buildings across cities.