Does Busan, South Korea belong to the countryside?

Busan does not belong to the countryside.

It is equivalent to a municipality directly under the Central Government of China. Generally speaking, China is as famous as Beijing and Shanghai.

Everyone knows Busan, Seoul, but some people think that Busan belongs to the countryside, which may be a misunderstanding. It may be that South Korea has its own similar dialect besides Seoul, and it doesn't speak authentic Seoul dialect.