Lan Se's idle speed is high. What should I do if the car body shakes?

If it is replaced in a special store, you can go to the store to check the assembly and see if it is improperly assembled. It is necessary to check the dynamic balance of the wheels when driving. Most cases are related to dynamic balance, followed by serious tire wear. What does it mean that the engine sound changes obviously? If only the sound becomes louder and there is no abnormal sound, it is recommended to check whether the oil level and quality are normal. This car is really loud after it exceeds 120 km at high speed.