Among the many colleges in Cambridge University, King's College is the most famous, occupying the largest area and enjoying the highest popularity. The screen door building is a new Gothic building in the 19th century. It was designed by King William & Will in the 1920s (the National Gallery was also designed by him). It is said that in order to build this gate, half of the buildings on King's Avenue should be demolished, which caused a lot of controversy, but facts have proved that this gate is a classic work, so many tourists praise it. Opposite the main entrance of King's College, there is a tourist service center selling tickets. The tickets are 5 pounds for adults and free for children. The College has a Chinese introduction, which is explained in great detail. It will tour slowly according to the open area of the map, and it will not miss the wonderful places.