What should I do if the idle speed of Tiida is high?

Hello, my friend, there are many reasons for the high idle speed of the car, which are roughly as follows: 1. Whether the spark plug is damaged needs to be checked; 2. Oil circuit/oil product problem, it is suggested to drive this tank of oil to a regular gas station to refuel and try the effect again; 3. Whether the idle motor is abnormal and whether the engine speed is abnormal at idle speed; 4. Whether the air intake system is abnormal; 5. Engine carbon deposit, lower throttle and nozzle cleaning; Please check the above items for your reference.