Page "Chinese units of measurement" Paragraph 5

According to the Liji, the legendary Yellow Emperor created the first measurement units.

The Xiao Erya and Kongzi jiayu state that length units were derived from the human body.

According to the Records of the Grand Historian, these human body units caused inconsistency, and Yu the Great, another legendary figure, unified the length measurements.

Rulers with decimal units have been unearthed from Shang Dynasty tombs.