It is often said that "every day is unpredictable." With the rapid development of science and technology, transportation and material life, disasters around us are also increasing. Opening the newspaper and turning on the television, most of them came into view: war, earthquake, tsunami, hurricane, fire, flood, air disaster, mine disaster, social unrest, violent conflict, terrorist attack and other extraordinary disasters. These calamities have happened, and their scale has also intensified. The calamities have inflicted pain, bloodshed, disability and death. The misfortune that happens around us every moment highlights the shortness and fragility of life. We cannot predict what kind of natural disasters will happen in the future, maybe the next day or hour, let alone what we should do in natural disasters ... 

... Read more »