What's the difference between Shan Gui with square eyes and Shan Gui with round eyes?

This is a lucky money to win money: left and right people: not Shan Gui, but a Taoist symbol; Qian Wen said: "Thunder, thunder, kill ghosts, get rid of evil spirits, and keep your spirit clear forever. I'm in a hurry, old man. Another aspect of money: most of them are "eight diagrams" and regular script "seeing the roots and treasures leave the Kun heap" There is no difference between round and square wearing, but the shape is different. It's just that folks wear it for good luck.