Introduction to the white jade stone square: In front of the main gate of the county government, there is a white jade stone square. On the forehead in the middle of the square are engraved the four characters "Minjuerzhan", which means that officials are also the people and should be supervised by everyone. On both sides of the stone square, the characters "Chongli", "Zhengfeng", "Dunren" and "Shangjian" are respectively engraved.