What are the benefits of cleaning the intake and exhaust pipes?

What are the benefits of cleaning the intake and exhaust pipes?

=============================================================

Like washing a pot, I didn't find the real reason. Feel free to use any chemical additives to clean the bottom of the pot, and the bottom of the pot will still be as black next time.

As shown in the above figure, once the engine is started, the parts that first produce carbon deposit are 1, intake valve 2, exhaust valve 3, spark plug 4, fuel injector 5 and cylinder. 6 Piston and ring groove? Wait a minute. After these parts produce high temperature carbon deposit, other places such as intake valve and exhaust pipe, intake manifold, exhaust manifold, throttle valve and exhaust pipe will produce medium temperature carbon deposit.

? If you just clean the intake valve and exhaust pipe, it's like wiping the bottom of the pot. No matter how hard you wipe it, it's useless. 1, intake valve 2, exhaust valve 3, spark plug 4, fuel injector 5, cylinder? 6 Piston and ring groove? And so on, produce high temperature carbon deposit, because the fuel is not completely burned. No chemical additives are used, and no carbon deposit is produced. Only the "Jiayoubao-Titanium Crystal Oil Saver" imported from Taiwan Province Province can "make the bottom of the pot not produce pot ash".