青铜器10000多件，仅夏商周时期的就有4300多件。
B-Thing I-Thing I-Thing B-Metric I-Metric I-Metric I-Metric I-Metric I-Metric I-Metric O O B-Thing I-Thing I-Thing I-Thing I-Thing O O O B-Metric I-Metric I-Metric I-Metric I-Metric I-Metric O