If you were given a chance to be reborn five years before the end of the world, what would you do in these five years? Some people say that I would spend money like crazy, buying food and supplies! What if you are a penniless poor boy? Let me tell you a different rule of survival in the end of the world! Remember, storing food is not the first priority, this is very important! No matter how much food there is, there will be a day when it will be eaten up, just enough to eat! Sustainable development is the hard truth! Food can be cultivated, materials are non-renewable, energy is the first priority, and the soft power of science and technology to maintain social development is also a top priority! Let me tell you a different story of survival in the end of the world from being penniless to being a millionaire!