Earlier quoted context omitted.
Not really. The ban doesn't apply to indoor ads so isn't applicable to the metro's trains or stations. As for the buses, they aren't displaying ads at all.
Buses are pretty much ads on wheels, --- and in some buses of the green variety [1] there are TV sets broadcasting most relevant content such as government propaganda, the horoscope, news and events, and yes, advertisement. [1] I'm yet to figure out what the colours mean on buses.
Regarding [1], each bus company has a different color. The companies won different government contracts for different parts of the city, so the east side is roughly red, the south blue, the north-west green, etc.