As can be seen in the bell and drum towers in Beijing (Beijing Gulou and Zhonglou), some have a bell tower in the north and a drum tower in the south while others have bell and drum towers in a single building like in Shanhaiguan shodrum tower.
北京鐘鼓楼（zh北京鼓樓和鐘樓、enBeijingGulouandZhonglou）のように北に鐘楼・南に鼓楼を配置したものや、山海関鐘鼓楼のように一体の楼閣である場合もある。