《新唐书·列传·卷一百四十五》
距离京师有一万四千里，在新罗的东南。国在海中，人民居住在岛上。从东到西要走五个月，从南到北则是三个月的路程。
去京师万四千里，直新罗东南，在海中，岛而居，东西五月行，南北三月行。
It was 14 thousand li away from the capital city, and was located southeast of Silla. It was a country in the sea, and its people lived on islands. It took five months to go through it from east to west, and three months to go through it from south to north.