Yi Sugwang had accumulated enough material from the Jesuits during his own diplomatic visits in the 1590s that he was able to compile the encyclopedic Jibong Yuseol.
Yi Su-gwang telah mengumpulkan bahan yang cukup dari Yesuit selama kunjungan diplomatiknya sendiri pada tahun 1590-an sehingga dia dapat menyusun ensiklopedia Jibong yuseol.