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 ->
Small Seal Script
Standardized 221–206 BCE (Qin); developed earlier in QinThe standardized seal script promulgated after Qin’s unification, based on earlier Qin seal forms and used as an empire-wide norm.Wikipedia ->