Correct

侦控

/ zhēn kòng / 
Strokes

Example

As a Verb

monitor and control

1
Zhēnkòng
侦控
xìtǒng
系统

monitoring and control system

2
Duì
对
shèànrényuán
涉案人员
yánmì
严密
zhēnkòng
侦控

put people involved in the case under close surveillance