The Haibao Tower is also called Hebao Tower, Heibao Tower or Northern Tower. It is said that the tower was rebuilt by the king of of Xixia Kingdom in the early fifth century, but the date when it was first built is unknown. Due to the damages resulted from earthquakes in the 51^st year (1712) of the Kangxi reign and the 43^rd year (1778) of the Qianlong reign in the Qing Dynasty, the tower had been repaired twice.

The Haibao Tower was built on a square brick base of 5.7 meters high, 19.2 meters wide and long respectively and surrounded by brick handrails. The main part of the tower is a storied building. Its brick base is square, 4.2 meters high and 14.4 meters wide. As for the walls, an entrance is located in the facade while false arch niches are in other three sides. The nine-storeyed tower is 44 meters high, including the tower top. The tower was built completely of bricks, and was bit by bit from lower storeys to higher ones. On the corners of each story there are iron bells. On each of the four sides of the storey there are doors with two false niches on both sides. Above the door and the false niches there is a 3-storeyed rhombus building. The structure of the tower features distinct gradation, strong and sharp edges and an unconventional style.

The tower top is a square spire in the shape of a peach. The spire is only glazed with green color and has no other appendages. Therefore, it looks unconventional. The inner part takes the shape of a cross, formed by connecting four brick objects in symmetry with four arches. The center of the cross is an empty square, contracting 15 to 20 centimeters upon each storey. The square is separated by the roughstring. The spiral stairs lead to the top of the stair.