Day 1: Ming Mausoleum, Sun Yat-sen Mausoleum, Linggu Temple, Presidential Palace, and you can go to Xinjiekou or Lion Bridge Food Street at night;

The next day: Xuanwu Lake, Taicheng and Jiming Temple;

Day 3: Mochou Lake, Memorial Hall, Yuhuatai, Zhonghua Gate, and go to the Confucius Temple scenic spot in the evening;

Day 4: Yuejianglou, Yangtze River Bridge.

If you want to live, it is recommended to live near Xinjiekou or Confucius Temple. Remember to book the hotel in advance to facilitate travel.

Finally, I would like to give you some advice on transportation and tour guide explanation: I suggest that you rent an "electronic tour guide", which has basically replaced the role of a tour guide, give a wonderful and comprehensive tour guide explanation, inquire about the bus and subway anytime and anywhere, and tell you how to take the bus. If you use their "electronic guide", you can ask them to help you book a hotel and enjoy many discounts! I wish you a pleasant journey in advance!