 Just like Taejong, he was a hardliner with regards to foreign policy and attacked the Jurchens on the northern front in 1460 (오랑캐/兀良哈) and 1467 (호리개/胡里改).He also revised the land ordinance to improve the national economy.He executed scholars from King Sejong's era for plotting against him, but encouraged publication of history, economics, agricultural, and religious books.