C224 A Messy Knock on the Door

He glanced at it and let it ring.

Tang Xiaoyan had a bad feeling, but she could not see who it was from far away.

It sounded again when it was quiet. No one picked it up after it sounded. It was quiet again.

Finally, it returned to silence.

It was a red light. Fu Yunqian did not even look at it and turned off the machine.

Tang Xiaoyan was a little worried