How often does the sagitar throttle have to be cleaned?

If the subject wants to know, "How often is the sagitar throttle cleaned?" The relevant contents are as follows:

Sagitar's throttle is cleaned once every 20,000 to 30,000 kilometers. If the environment inside the car is bad, this cleaning interval will be shortened. Throttle is a controllable valve that controls air to enter the engine. There are two kinds: traditional cable throttle and electronic throttle. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned to do work. Sagitar is a compact car launched by FAW-Volkswagen. Its length, width and height are 4753mm, 1800mm and 1462mm respectively, and its wheelbase is 2731mm. It is equipped with two turbocharged engines, 1.2T and 1.4T, with maximum power of 85kw and 65438 respectively.