Central idea: innovation leads to development, old evils are eliminated, new goodness is replaced, history can progress and human beings can develop. The first paragraph points out the importance of reform and innovation, demonstrates in the middle, quotes from classics, and combines modernity. Reform and opening up is a good example. To sum up the topic in the last paragraph, the argument should be clear-cut and logical. It's up to you. . . I wish the spring of your thoughts become important by the way, and there is also sorrow for it.