Besides being a kind of architecture, the symbolic meaning of "door" is highlighted. The opening of colleges and universities is first of all a footnote to the change of epidemic situation and the gradual recovery of production and life order. As a benchmark event, the previously unremarkable "routine action" has gained different social attention from the past. At present, the national epidemic situation is becoming more and more stable, so it is necessary for colleges and universities to open their doors in time.

In the past, we discussed the opening of colleges and universities, mainly focusing on how tourists can visit the campus without disturbing the normal teaching and research order of teachers and students, and how resources such as university libraries can be reasonably opened to the public. Colleges and universities are moderately open and tourists visit in a civilized way, and an understanding has already been reached. As a physical building, the "door" separates the school from the school.