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Images:

https://commons.wikimedia.org/wiki/File:Erlitou_map.svg

http://www.kaogu.cn/en/Research_work/Other_topics/2014/0728/46977.html

https://en.wikipedia.org/wiki/File:CMOC_Treasures_of_Ancient_China_exhibit_-_bronze_jue.jpg

https://www.thechairmansbao.com/wp-content/uploads/2018/03/Yu-the-Great-1.png