“登州海行入高丽道”是唐代重要的海上航道。但在不同时期,其主要航线也不尽相同。大致说来,前期主要从登州北部的蓬莱、黄县境内的出海口出发,沿着贾耽所记述的“登州海行入高丽道”的航线航行;后期则主要从登州南部的牟平、文登县境内的出海口出发,横渡黄海,直抵韩半岛。正是在登州通往朝鲜半岛主要航线变迁南移的形势下,赤山浦以其优越的地理位置和交通条件,成为新罗商人张保皋首选的在唐贸易最重要的联络地和中转站,并在这里修建了一座法华寺院。 “Dengzhou sea into Korea Road” is an important sea channel in the Tang Dynasty. But at different times, its main routes are not the same. Generally speaking, the early period mainly proceeded from the sea ports in Penglai and Huangxian in the northern part of Dengzhou, sailing along the route described by Jiala as “the passage of Dengzhou sea into the Kaohsiung Daoguang”; in the latter part, , Wendeng County, the departure of the sea, across the Yellow Sea, arrived at the Korean peninsula. It is precisely in the situation that the main route from Dengzhou to the Korean peninsula changes south and the Chiyamapo is the most important liaison and transit point for trading in Tang Dynasty preferred by the Shangluo trader Zhang Baogao because of its superior geographic location and traffic conditions A Fahua temple was built here.