The main entrance of Nangong in Luoyang in the Eastern Han Dynasty, the main entrance to the south of Beijing, is located in the east of Luoyang City. Gong Bei is located in the northeast of Luoyang, and the North and South Palace are on the north and south walls of Luoyang, seven miles apart. These palaces are much smaller than those in Chang 'an in the Western Han Dynasty, but they are also very elegant. According to "Three Auxiliary Huang Tu", the palace building takes "Mulan as the curtain and satellites as the pillar; Pujin Jade Pot, Huawang Dang, Carving Jade Hill, Re-porch Decorating Threshold, Clear Lock Dan, Left City and Right Level; Gold is the wall belt, surrounded by jade, and the wind makes it sound exquisite. "