Jianshui County, a very old town in Yunnan province, owns many ancient wells. Ximen well, the most famous one in the county, has fed residents for hundreds of years.
Until now, some big or small nicks had been rubbed on round edge of the well since residents fetch water by a bucket and a rope that abrades the edge every day.
No one knows an accurate proportion between dent depth of the well and water volume held in the bucket. --By : InKunming
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