The upper level with both vehicle and pedestrian access was selected as the main entrance, but the narrow width of 'pointing finger' part made another obstacle.
上部有车行和人行通道，因此被选作为主入口，但是“伸出的食指”的狭窄宽度成了另一个障碍。
2
Regulation stage and width of Hutiaomen estuary (Hengshan-Hutiaomen entrance) were get by utilizing the above-mentioned methods and formula.