This is a high floor area ratio event container that accommodates both campus and community life. Using the method of subtraction, "digging holes" in the dense classroom array to create an "∞" type of public space system of informal communication with three-dimensional spatial circulation. Through colorful staircases, platforms and small buildings, the design makes the campus a place that can stimulate children's curiosity and imagination. And these " holes" also allow the light and wind to diffuse into the center of the building to with the activities of the students.