When Qiao Anhao passed Lu Jinnian's classroom, she was used to glancing through the window and at him sitting with a white shirt at his desk.
At the time, he was in physics. All the students carefully listened to the teacher talking behind the desk at the front. Most were taking notes, all apart from Lu Jinnian, who had his head lowered, a pencil in hand. He was sketching something on a white piece of paper on the desk, sometimes using a rubber.
His classmate who shared his desk noticed he was absent minded in class and tried to peer over at what he was sketching. Who knew that Lu Jinnian's reactions would be so fast, he took a book and covered his paper.
Their actions suddenly alarmed the teacher, who was giving the class. The teacher called their names out and asked them a question.
The classmate who shared the desk stammered at the question, but Lu Jinnian blinked for a second and then clearly and accurately answered.