How often does Magotan B7 clean the throttle?

Magotan B7 travels 20,000 kilometers to clean the throttle. Throttle is the throat of automobile engine, which is located between air filter and intake manifold. It is a controllable valve that controls air to enter the engine. The depth of stepping on the accelerator is directly related to the opening of the accelerator, so the performance of idle speed and power is closely related to the cleanliness of the accelerator. Magotan B7 is a medium-sized car owned by FAW-Volkswagen, with the length, width and height of 4866mm, 1832mm and 1464mm respectively, the wheelbase of 287 1mm, the top speed of 2 10 km and the fuel tank volume of 66L.