C1373 A Little Community of Psychopaths

"It's okay, this is my brother's voice." Ding Lan explained with a smile.

"Dong, dong, dong." Ding Lan knocked on the door.

A few seconds later, the door was opened from the inside.

A man in his twenties stuck his head out.

"Sis, you're here. I'll leave dad to you, I can't handle it." As he spoke, he slipped out of the room.

Ding Lan shook her head and said to Xu Zhe, "Dr. Xu