C507 Dragon City

"Ding dong!" Ding dong! "Howl …"

The doorbell rang.

Cheng Bing put down the book in her hands and headed for the door.

Arriving at the door, she brought her eyes closer to the peephole and looked at the figure outside. Her brows slightly creased, showing some hesitation and hesitation.

After staring blankly for a moment, "Ding dong", the doorbell rang again