As is known to everybody,we can not live a happy life without enough food and clothes.Therefore a poor man will have to suffer from hunger and cold.On the other hand,if one is rich,he can afford to buy the necessities.What is more,the riches could pave the road to further learning as well as further personal development.However,poverty harms us both physically and mentally.why does the present political policy focus on the economical development?That is because a poor China provides its people but miseries and unhappiness.Only when China gets richer,can it make its people happier.