My Le Chi, the valve is depressed. How to solve it?

As far as this problem is concerned, we should first check the spark plug, see the combustion of the spark plug, see if there is air leakage in the spark plug, and also check whether there is air leakage between the spark plug and the ignition coil. If conditions permit, you can replace the spark plug and see if there is any fault in the position where the spark plug is inserted.