C990 qi-qi

After hesitating at the door for a moment, Du Chunfeng knocked on Chu Yu's office door.

"Dong, dong, dong!"

"Come in!"

Chu Yu's clear voice came out from the office, Du Chunfeng gently pushed the door open and walked in.

At this time, Chu Yu was immersed in inspecting something, and even she did not look up when Du Chunfeng entered