Climbing in South Korea

I will be traveling to South Korea on business and wanted to extend my stay a bit and maybe do some climbing. I won’t be able to extend my stay very long as things will be busy for me at work. I was wondering if anyone had any recommendations or beta they can give me on climbing in Korea and showing up in a foreign country on your own looking for partners. I will most likely be in Daejeon and/or Sacheon for work and will likely go in April but maybe again later on.

I haven't been there in 20 years while I was in the Army at Camp Essayons in Uijeonbu so any beta I have is like a Soju hangover. Give this a look.
koreaontherocks.com/