The two harbors are located in both sides of identical port territory, only 9 miles away from each other, and use the same navigational water way, anchorage as well as economical hinterland.

• 两大港口位于同一港域，分属同一港域的两侧，相距仅9海里，使用共同的航道和锚地，拥有同一经济腹地，港口的自然条件相近，却因行政区划和管理体制的不同，被人为地变成在规划布局、建设和经营等方面互不相干的两个港口。