* 拼音xū。古代锹、 铲一类的工具
(translated) In ancient times, it was a tool like spades or shovels
c. 1200–221 BCE (Shang–Zhou; continues into the Warring States)
Inscriptions cast or engraved on ritual bronzes, especially prominent from the Western Zhou onward; a major source for early political, ritual, and social history.Wikipedia ->
Standardized 221–206 BCE (Qin); developed earlier in Qin
The standardized seal script promulgated after Qin’s unification, based on earlier Qin seal forms and used as an empire-wide norm.Wikipedia ->