C583 Substitute?

Lu Zheng was immediately dumbfounded when he saw Leng Ningshuang. Why would Leng Ningshuang appear here?

But obviously, when Leng Ningshuang saw Lu Zheng, he picked up his cup and walked towards Lu Zheng with a smile: "Student Lu, when are you going to substitute teacher?"

Leng Ningshuang had a faint smile on his face, and he looked completely different from his previous ice-cold appearance