China ancient times mainly used in the construction which reported time. The bell tower and the drumtower gather the name. Zhong Gulou has two kinds, one kind constructs in the palace, one kind constructs at the urban center region, many are two buildings. In palace Zhong Gulou begins in the Sui Dynasty, stops in the Ming Dynasty. It besides reports time, when takes faces the meeting controls etiquette. In urban Zhong Gulou for special-purpose reports time early the construction. In ancient times in the work place system city (saw) imposes the curfew, sooner or later will beat a drum to open shuts the gate the signal. Constructs in the bright Hongwunianjian Xi'an bell tower drumtower is the extant most ancient example. In addition, in the Tang Dynasty temple also supposes Zhong Hegu, the Yuan, the bright time development for the bell tower, the drumtower relative constructs, feeds specially Buddhist ceremony.

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