Please tell us about the four-wheel drive problem.

In four-wheel drive, the front and rear axles are hard connected (there is no intermediate difference), that is, the front and rear four wheels are integrated (just equivalent), and the flexible steering function (only a certain steering ability) is lost on hard roads. When cornering is needed, the hard-connected front and rear axles will compete, and the car will easily lose stability because it can no longer adjust the wheel speed under the action of differential speed.