It's the Ford all-in-one car down the lane one block away from the Probiotics Square, and now they're monitoring every move of the Probiotics Square Health Center 24 hours a day.

A black crowd stopped at the roadside. Officer Chen, dressed in plain clothes and wearing sunglasses, got out of the car and looked around. Then she walked into the car. After closing the door, she looked at the surveillance screen and asked, "What has happened in the past three days?"

"No, the target doesn't reveal anything." A monitor answered.

"What has he done in these three days?"

"During the day, when there are classes, he will go to class,...