old Ji'nan has four gates, and today, only the north gate still remains. This is the Hui Po gate in the northeast corner of Daming Lake (also known as the Hui gate and the North Water Gate). Because of the many springs in the city since then, so this name. In ancient times, because the East, West and South and north gates of Ji'nan were not on an axis, and the north gate was a Watergate, there was a saying that "four doors are wrong and the north gate is not open." 
old Ji'nan original four gates, but now, only the north gate still remains, this is the northeast corner of the Daming Lake (also known as the gate, the North Water Gate). Because of the many springs in the city since then, so this name. In ancient times, because the East, West and South and north gates of Ji'nan were not on an axis, and the north gate was a Watergate, there was a saying that "four doors are wrong and the north gate is not open." Wang Jun / photo of Shandong Photographer Association