Let the auto electrician help me !!!

the right headlight lamp of the vehicle bursts constantly, the left headlight is smooth for 5 years.

now I have measured the voltage when the vehicle is running, the right side is 14.20v when the stop is 12.20 normal now

In my opinion, there is no problem in the role, while the car is running, the dyno produces 14v and the battery gives 12 v output. Your headlight can be powered by the headlight dynamo.

Yes there is xenon installation right now

plug in a high voltage bulb to solve the problem