Like Beijing, Shanghai and other mega-metropolis, economic strength, cultural heritage, transportation hub location and other aspects have the conditions of the world's cities, but traffic congestion makes the emergency rescue capacity into a major weakness. Zhangjiakou, for example, there are hundreds of cases of patients transferred to Beijing each year, often a blockade on the highway half loud can not be moved, even if the traffic is not traffic jams also need 3 hours. If the transfer by helicopter, air flight only needs nearly 40 minutes, but also to prevent the patient traffic fluctuations in the injury aggravation. Helicopter emergency can be in the 30-minute golden rescue period for patients to get treatment, and more to prevent the transfer of aggravation of the disease on the way.

 　　                    Thus, the improvement of helicopter help system also shows the level of modernization and civilization of a city. Many big cities have started to build rooftop helipads, which facilitates helicopter landing and takeoff. But in the cold winter, the apron platform structure will accumulate snow and ice, to the helicopter landing to form inconvenience, so need a set of snow melting ice system to deal with. The electric heat accompanying system with heating cable as the core is a good choice for melting snow and ice in helipad.

 　　                       Heating cable warms up fast, heats up evenly, is easy to install, requires no manual operation, is safe and environmentally friendly, and is also widely used in many fields such as hospitals, family electric heating, farm breeding heat preservation, greenhouse vegetable seedling, office building electric heating, geothermal cultivation, and snow melting on roof gutter, etc., to provide systematic solutions for winter heating and indoor heat preservation.