Korean enterprises can be said to be everywhere, but what I see are mostly small-scale processing enterprises.
Learning Korean, I heard that Chengyang has "Guangtong Korean Training" and "Tsinghua", but I have never been there.
In addition, to learn Japanese and Korean, you can also go to "New Oriental" and "Mountain Tree Training". There are some in Qingdao.
In addition, I saw a foreign language (Japanese and Korean) training school in the Crystal Capital Community of Deyang Road.