The main part of the marker tower is a concrete and granite mixed masonry structure. The foundation part is altar-shaped. The arrangement of floor stones adopts the Eight Trigrams form of Taoism. The tower body and tower foundation are a total of 30.4 meters. The tower body is 23.5 meters high and is in the shape of an upright rocket. The bottom of the tower is spherical. Granite is laid in the center and carved into a hemisphere outline. A brass column with a diameter of 4 centimeters is embedded in the center point, and thick copper strips are inlaid in the east-west direction to indicate that the Tropic of Cancer extends to the east and west of the earth from this point. The top of the tower is a hollow circular hole with a diameter of 120 meters supported by a stainless steel cylinder for direct sunlight calibration. At noon on the summer solstice every year (12:26), the sun will directly shine on the circular hole in the sphere and project the light spot onto the copper column point on the spherical surface at the bottom of the tower. At this time, people standing under the tower will have no shadow. The specific business hours and opening status are subject to the opening situation on that day.
