Because Zhao Zhouqiao exists on both sides of the Taiwan Strait, let's regard the two sides as belonging to the same plane.

So Zhao Zhouqiao's' central angle' should be 180 degrees, which is half a garden.

But the intersection of the semicircle and the ground should be perpendicular to the ground, that is, tangent. Then how do you get up there?

So it should be a parabola of the square of y =-2px!