Koreans don't know Chinese characters, so how do they read ancient books and understand history?

Because of going to China, there will be cultural inheritance problems in Korea sooner or later. Many young people can't even read the plaques and couplets on historical sites, but at least they can understand their Chinese names in the household registration book. As for the one upstairs who said reading ancient books is an expert, are you from China? Did you go to or graduate from high school? It is no problem for a qualified China senior high school graduate to understand 7788 with the help of pre-Qin ancient prose, as long as you are interested in reading it.