元代和明代,是中国古代历史发展的鼎盛时期,也是北京历史发展的重要阶段。正是从这时候开始,北京成为了全国的政治和文化中心。在这个重要的发展阶段,北京的各个方面都发生了巨大的 The Yuan Dynasty and the Ming Dynasty were the heyday of the development of ancient Chinese history and also an important stage in the historical development of Beijing. It is from this moment that Beijing has become the political and cultural center of the country. In this important stage of development, great changes have taken place in all aspects of Beijing