The mythical Pi Yao is displayed in symbolic Feng Shui as an enhancer and protector. It is also identified as Pixiu or Pi Ya and resembles a winged lion sometimes with one or two horns, and sometimes without.   It is said to be the ninth offspring of the mighty Dragon.  As standing or upright sitting images they can look similar to, and be mistaken for, Fu Dogs who also have the head of a lion.  Historically Pi Yao decorated the four corners of rooflines in residences of the Chinese Emperor and important members of the court, the wealthy and famous, to protect them against Sha Qi (negative energy.)
 
Like the Fu Dog, it is used as an outside protector from Sha Qi and from evil spirits.  As protectors they are best displayed on either side of an entrance or a doorway looking outward.  A pair are separately known as Pi Xi which is the dispeller of evil and Tian Lu, a heavenly protector. They are said to be fiercely loyal to their owners. 
 
Said also to symbolise auspicious good fortune, the Pi Yao is a creature with a insatiable appetite for gold and silver; precious metal that it can take in but not expel, thanks to a punishment imposed on it following its violation of a Law of Heaven.  This makes it a favourite image for businesses and stores in the Far East.  From financial institutions to market stalls the figure of the Pi Yao can often be seen in an attempt to attract wealth.