Portal?

The special tires for German special vehicles, which were filled with high polymer bulletproof refill fluid, could automatically fill the holes caused by steel nails and bullets within one second. And, when the vehicle computer detects the pressure loss in the tire, it would immediately start the vehicle inflation system, so long as it was not too big a hole, it could still drive safely. Of course, this was all just based on the fact that it was punctured, and in fact, inside the tire, there are two layers of reinforced metal mesh that can resist the design of a small-bore bullet.

"The car ahead, stop at once! The car ahead…" Two white police cars, which had come from some unknown nearby corner, could no longer see the car, before the second sentence was uttered.

Honk! Honk! Honk!