Is that Chong-Ju near Daejeon? (There are so many places with names like Cheongju, junju, jeonju, Chungju, etc...) I ask because I am living in Daejeon as well and if its the same Chongju, it's only 40 minutes away.
As far as climbing goes, if you want to climb the limited trad that's available, it's best to just find someone with gear. Otherwise most everything is bolted.
Can't help with the paragliding.
To retreat in dynamic fashion from a climb.