Why are there so many Chinese characters in Korea?

Koreans recorded their language in Chinese characters before15th century. Proverbs (Hangul, Joseongul, Korean or Korean gul, Korean or Korean) have not replaced Chinese characters as Korean writing for a long time. By the end of 19, Korean began to merge with Chinese characters, and at this time, "Korean-Chinese mixed writing" became the main writing method of Korean. After the independence of the Korean peninsula, the North and South Korean governments began to abolish Chinese characters in Korean one after another based on the consideration of nationality, and advocated writing and recording Korean only in Korean (that is, pure language). North Korea restricted the use of Chinese characters from 1946, and completely abolished Chinese characters from 1949. South Korea banned the use of Chinese characters in government documents on 1948, and further banned the use of Chinese characters in official documents on 1968. However, news newspapers still use Chinese characters to identify some special people or surnames. Korean names are all in Chinese except Korean, and there are even Chinese names on ID cards. The Korean Society of China also abolished Chinese characters in 1953, and only recorded Korean in Korean.