What font is written at the door of Tsinghua University?

It should be seal script (official script: also called "official character" and "ancient book". It is a font produced on the basis of seal script to meet the needs of convenient writing. The seal script is simplified, and the uniform circle lines of the seal script are changed into straight strokes, which is convenient for writing. Official script can be divided into "Qin Li" (also called "Guli") and "Han Li" (also called "Golden Calendar"). The appearance of official script is a great change in ancient writing and calligraphy. ), I saw it, and it's quite similar.