The economic region of the Pan-Bohai Sea is a concept of the Historical Economy Geography, it is different from the administrative region of the Pan-Bohai Sea.

• 摘要“环渤海经济区”并不是一个边界固定的经济区域，其形状、范围和经济关联度，都随着沿海港口城市经济辐射力的强弱而不断地发生变化。