The stone foundation was excavated to form a tunnel ('Ketsu' (gate provided with Rokaku (multi-storied building) in ancient China)), on which a wooden multi-storied building was constructed with a 'tablet' showing the name of the gate.
石造りの土台をくり抜き、トンネル状として（これを「闕（けつ）」という）その上部に木造重層の楼閣が建てられ、その上には門の名称を記した「扁額」が掲げられた。