How many kilometers is it appropriate to clean the throttle?

It is suggested that all the cleaning of 20 thousand kilometers should be carried out by the water army. Please pay attention! ! ! It is good to clean it once every 60,000 kilometers during normal driving, unless you drive in a place with poor road conditions (dirt roads, construction sites and the like) all the year round and drive on normal urban roads. For ordinary families, it is good to clean it once every 60,000 kilometers. I drove 60 thousand kilometers in three years, and the throttle is still clean.