To be honest.
When someone is deep in thought and suddenly startled by another person appearing at their side, it can be quite frightening.
Especially when the other person is bald, with a shiny forehead gleaming brightly in the sunlight, it nearly scared Xu Yun into reaching for the nitroglycerin in his pocket.
"..."
However, remembering that the University of Cambridge has its share of eccentric thieves, and this person might even be a teaching assistant or a professor, Xu Yun forced himself to calm down.
He first took a look at the person's appearance.
The Big Bald Head resembled Guo Da from later generations, with some golden hair on either side of his shiny forehead, and a forehead full of deep wrinkles.
He appeared to be in his forties but had an expression of deep bitterness and resentment.
He then placed a bookmark in the reading section of "1650-1830: Two Hundred Years of Scientific History Transition," closed the book, and asked the person:
