When Li Zheng found Jie Qifen in the hallway, he was sitting alone on the steps, with no smell of smoke around him.
"Aren't you smoking?" Li Zheng casually sat next to him.
"No, I would if I had any." Jie Qifen patted his pocket and looked back, "Where are they?"
"They're still discussing that model." Li Zheng smiled wryly and lowered his head, "I'm having a bit of trouble with it, I'll go back and chew on it slowly tonight."
Jie Qifen saw the troubled look on Li Zheng's face and began to comfort him, "It's right to struggle. Only people like Gu Jianfeng, who have a grand unification understanding of geometry and abstract algebra... or those born with a brain different from ordinary people, can imagine the diagram in such a short time."
"Yeah, right." Li Zheng pointed in the hallway, with his forehead covered, "Inside, one with a mathematical grand unification, one born with a different brain, I'm having a tough time..."
