During the period of the first unified kingdom Shilla, Cheonghaejin Ambassador Jang Bogo was famous for building large forces on the sea in East Asia, straddling as far as China, Japan.
最初の統一王朝新羅の時代には、清海鎮大使張保皐が中国・日本まで股にかけた東アジアの大海上勢力を築きあげたことが名高い。