Introduction to Yimen: Yimen is the door of etiquette. According to the etiquette system, the middle door is for the entrance and exit of princes and nobles, while those with lower official ranks and common people can only enter and exit through the side door. There is a plaque "Holy Virtue Xianzhan" on the door, and the stone drums on both sides also contain pictures of marquisships (bee, monkey, bird, deer), which means that the emperor's grace is great and spreads to all living beings. Anyone who enters this ceremonial gate will be granted the title of marquis and prince in the coming year. Make a fortune.