由于政治因素的影响,宋朝的对外海上贸易空前发达。宋朝的船舶在西太平洋及北印度洋上破浪驰骋,如履平川,甚至超越了盛唐时期最远的航线。这除了得益于其先进的造船技术外,更与指南针在航海上的应用密不可分。 Due to the influence of political factors, the Song Dynasty’s foreign maritime trade was unprecedentedly developed. Song dynasty ships gallop across the western Pacific Ocean and the northern Indian Ocean, following the example of Hirakawa, even beyond the farthest route of the Tang Dynasty. This is not only due to its advanced shipbuilding technology, but also with the compass in navigation applications are inseparable.