After reading a lot of information, I feel that there are many modern rescue equipment that are very useful, such as electric shears, which can cut the steel bars in building concrete to facilitate rescue: portable shears and expanders, When gasoline and electric power are not available on site, manual portable shears can play a huge role. Support series, when survivors are found, tools such as shearing and expansion can be used to clear obstacles, and then the support can be used to build a fixed support around the channel to safely rescue the survivors.