Answer: Specific route: It is recommended to visit from west to east in turn: 1. Go to the Summer Palace first, and get off at Beigongmen Station of Metro Line 4. If you have time, take a big turn, about half a day. If you only want to visit these three scenic spots in one day, it is suggested that the Summer Palace enter from the north gate, go directly to the Buddha Pavilion, get off the bus, then go to Shifang and Xiti, and then go back. You can look at the long corridor and come out of the East Palace Gate. 2. Peking University, coming out of the Summer Palace, takes the first crossing to the east and goes south, which is the East Gate of Peking University and the West Gate of Tsinghua. You can go to Peking University first, and the security guard at the door needs an ID card to register. Tsinghua Ximen often stops people. If you stop someone, you can go around the southeast gate and go in. Take bus No.307 or No.355 and get off at East Gate Station of Peking University, and get off at Tsinghua Campus, and you'll be there.