“hua biao”(ornamental pillar) is an exquisite structure in ancient Chinese architecture. It is mostly erected in front of bridges, palaces, city walls and tombs as symbols and ornamentals. It emerged in the late period of the primitive society and experienced a long historical evolution. People set up wooden posts at major crossroads as their street signs. People could also write their criticisms on them. It was a symbol to show the monarch’s willingness to accept the views of the common people. With the on-going of history, the function and form of it developed and changed. Wood was gradually replaced by stone. In the Ming and Qing Dynasties, it formed a basic pattern: stone-made, with an exquisitely carved Xumi base and an eight-angled or a round post on it. For emperors, the surface of the post would be carved with flying dragons up and down, and for others, with ordinary designs or just plain-surfaced. A decorative board was installed across the upper part of the post and a round plate with chains of pearls was placed on the board. At the top of the plate there stood a stone mythological animal called “hou”. Both in front of and behind Tian’an men were erected a pair of “hua biao” made duing the Yongle Period(1403-1422A.D.) of the Ming Dynasty. The “hou” on the pair in front of Tian’an men, facing south, were called “wang jun gui”(awaiting the emperor’s return). It was supposed that their duty was to watch over the emperor’s behavior when he went on an inspection tour, and to summon him back to attend to the state affairs rather than the outside. Behing Tian’an men, the “hou” facing north was called “wan g jun chu”(awaiting the emperor’s emergence), to remind the emperor to often go out to see his people, and not indulge in the disdipated court life.