Triangular land, located in the campus of Peking University, adjacent to the Centennial Lecture Hall of Peking University, with an area of less than 10 square meter, is named for its triangle shape. Here, it used to be the democratic front where people expressed their opinions and opinions. With the changes of the times, there are no more posters in the triangle, but only posters. You can find all the lecture information of Peking University here, which is a way for Peking University people to receive resources. In June 2007, the information column of Peking University Triangle, which existed for decades, was demolished. The school says there is too much business information in the information column, which is the need of environmental improvement. In Peking University, it is an information distribution center. Posters of various associations are posted here. Of course, there are also some advertisements for houses and the like. It is an active part of Yanyuan culture, and now it has become synonymous with campus center.

At the end of 2007 10, the school demolished all the exhibition boards in the triangle. This seems to mark the death of the old triangle. Today's triangle has been extended to the triangle square in front of Peking University Centennial Lecture Hall and its surrounding paths. This is also the location of the annual Hundred Regiments War.