The angular styles of the early Tang masters, Yu Shinan, Ouyang Xun, and Yan Zhenqing, persisted until the 14th century, when the more rounded style of Zhao Mengfu came into vogue. Korean calligraphy became increasingly formalistic in the years that followed.Kim Jung-hee revolutionized Korean calligraphy in the early 19th century, introducing what is known as the chusa style after his pen name 秋史, inspired by the ancient Chinese lishu script.
As the scholarly classes used Chinese characters, Korean calligraphy used hanja until the 1910–1945 Japanese occupation of Korea. Nationalist sentiment led to the popularization of the native hangul alphabet, and calligraphic works using hangul have since seen a revival.
The Korean calligraphy is developing its own style, steadfastly. Fonts that are not square are being developed, considering jong-sung, or sound coming after the vowel.