The most prosperous and active periods of China culture are the pre-Qin, Wei and Jin Dynasties and the Republic of China, all of which are troubled times. However, I especially admire the Northern Song Dynasty. Scholars in the Northern Song Dynasty will not be convicted for their words. Although there were great men in other times, the social atmosphere at that time was not conducive to cultural development. One more thing: when Yuan Shikai was president, Beijing newspapers could criticize Yuan Shikai every day, but they didn't say whether it was right or not. Do any newspapers in China dare to do this now? Only when language is not condemned can culture prosper.