From this page of the Hitman 3 guide, you will learn how to sabotage the surveillance tapes in Chongqing (China).
Surveillance cameras installed in Chongqing (China) area can make Agent 47's job much more difficult - especially on the highest difficulty level. Turning off surveillance makes it easier to navigate the well-guarded ICA facility and homeless shelter building, and streamlines the execution of all the optional map objectives in Chongqing.
Approach the hidden passage to the ICA facility and enter the code 0118 to gain access. Then go through the corridor to the inside of the underground complex.
Go down the stairs and turn to the room on your left. You will notice a vent entrance on the right - hack it with your camera.
Hide behind the desk of one of the guards. When none of the men are looking in your direction, sneak to the double doors at the other end of this room.
Go through the hallway - watch out for the camera on the left. If it detects you the guards will start hunting you down.
If the man marked in the image above is not standing next to the bodyguard, you will have to wait until he finishes drinking his water and approaches the desk on the left.
Hack the lock on the left then and sneak inside. Take the level two clearance from the desk.
Now go back to the hallway with the camera and sneak to the door. Hack the lock on the right and move on.
Go downstairs and then through the double doors. There is a ventilation shaft on the left - hack the vent entrance and go inside. Go down the ladder and hack another vent entrance, then go out into the hallway.
You will find a camera installed on your right. Continue past the point where the green lines are not touching the wall on the left.
Wait for the guard to approach the passage, then use the terminal to distract him. Hide in the closet and wait.
When the guard shuts down the terminal, come out of the closet, overpower him, and change into his stuff. Hide the body in the closet.
Go through the hallway and then use the door on the right (watch out for the camera) to access the upper level of the facility.
Turn right and go through the employee area. If Imogen Royce's personal bodyguard is hanging near the computers, you will have to sneak past him.
The next hallway has one camera installed, but you can easily turn it off with your camera. Scan the terminal shown in the image above and sneak into the security room on the right.
Hug the wall on the right, open the bathroom door, and throw an object inside (e.g. coin) to get the attention of the guard sitting at the desk.
Hide behind the flowerbeds and wait for the guard to enter the restroom. Then attack him from behind and incapacitate him. You can put the body in the closet.
When the guard roaming around this room is not looking in your direction, sneak over to the desk on the right and destroy the Camera Recorder.