Introduction to the Si'en Archway: The Si'en Archway is the first formal entrance architectural landscape in the scenic spot. It is made of antique bronze and has six pillars and five doors based on the shape of the "Eternal Changchun Square" of Confucius in Qufu. The total height of the archway is 13 meters, the width is 15 meters, 6 pillars and 5 doors, 8 roofs on the 7th floor, and double hanging flower columns, which means to miss the kindness of the Yellow River and the earth. The middle plaque on the archway is inscribed with the word "Si En" in regular script, and the left and right side plaques are inscribed with "Drinking water and remembering the source" and "Being grateful" respectively, which is also the theme of the "Si En District".