How often does Sylphy change the throttle?

Xuanyi needs to change the throttle every 20,000 kilometers. Throttle is a controllable valve that controls air to enter the engine. There are two kinds: traditional pull-wire type and electronic throttle valve. 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. The air filter is connected with it, and the engine block is connected with it. Sylphy is a compact 4-door 5-seat car with length, width and height of 463 1mm, 1.760mm and 1.503mm respectively, with a wheelbase of 2700mm, equipped with a 1.6L naturally aspirated engine and a 5-speed manual transmission, with a maximum power of 90 kW and a maximum torque of 60. Million car purchase subsidy