When refueling, the engine shakes.

In fact, situations like yours are very common. Theoretically, the fuel supply system and air intake cannot keep up with the engine operation. I suggest you check whether the fuel injector works normally (whether the fuel injection is uniform and powerful), whether the air inlet throttle is dirty (whether the valve is black and whether the oxygen sensor is covered). Furthermore, check the high-voltage bag and the spark plug to see if the high-voltage bag is not working properly (whether there is an electric channel) or whether the spark plug leaks (whether the spark plug is bald due to high-voltage electric shock or whether it burns a dirty ring near the thread).