archaeological relics of dian bronzes from the warring states period

alloy ancient appeared archaeological artwork auspicious bluish bronze bronzes called cattle chemical china chinese consumption copper culture design development dian dynasties early elements exquisite gold green han history horn iron its lead legacy majiayao metal model most ones other period photography play progress qin red relics retro rivers rust shang shelter sky started states such thickness times tin travel ware warring was yangshao zhou