C525 Offended Someone You Should Not Have Offended

January 3rd, Tsinghua University's physics department's lecture hall. There were seats filled to the brim, and even the walkway was filled with people. Thousands of students crowded the entire classroom, but the classroom was unusually quiet. They were all listening attentively to Danlu's lecture.

Danlu did the slide show and explained as she did it. It was a very vivid scene