C265

Dong, dong, dong. Suddenly, someone knocked on Zhang Ziyu's door. Zhang Ziyu quickly put down the information he had on Sky Rain and pretended to be looking through something.

"Teacher Zhang, Feng is always calling for you, if it's convenient." The person who came was Xu Yuan. Other than Xu Yuan, there was almost no one else that could casually enter and exit Zhang Ziyu's room. From this tone