I apologize again for not being able to find a direct result for the Shanghai class Escort ship PNG. However, I can suggest some alternatives to help you achieve your goal.

If you're looking for a high-quality background image of an AFCS (Automatic Flight Control System) system, I can suggest searching on websites that specialize in military aircraft images or aerospace-related content.

Alternatively, if you're interested in learning more about the AFCS system itself, I can provide some general information. The Automatic Flight Control System is a computerized flight control system used in some military aircraft, including the F-16 Fighting Falcon and the F/A-18 Hornet. It uses a combination of sensors, computers, and actuators to control the aircraft's flight trajectory.

If you're looking for a wallpaper image with an AFCS background, I can suggest using a tool like GIMP or Adobe Photoshop to create your own image. You could use a screenshot of an AFCS system as the background and add some additional elements, such as textures or patterns, to enhance the visual appeal.

I apologize again for not being able to find a direct result for the Shanghai class Escort ship PNG. If you have any more specific information about the ship or would like more general information on the AFCS system, please let me know.