Why didn't the gate of ancient merchants face south?

Because the five elements of the word "Shang" belong to gold, the south belongs to fire, and the fire is gold, so the door facing south is unlucky; In addition, in ancient times, agriculture was valued over commerce, and the position of the facade facing south was too respectful, which was easy to be suspected of trespassing; If you don't face south, you should keep a low profile to avoid attracting the attention of the government and thieves and causing trouble.