The Classical WorldGovernment & Law Qin unifies China 221 BCETurning point Qin Shi Huang unifies China and standardizes script, coins, weights and axle widths. A unified China becomes the ideal. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → First fired clay figures → First pottery → Copper smelting → Bronze Age begins → Shang dynasty → Zhou dynasty and the Mandate of Heaven → Spring and Autumn period → Legalism (Shang Yang) → Qin unifies China Community notesLoading notes… Learn more ranked by votesDocumentbritannica.comQin dynasty (Britannica) ↗Editor's pickBookJohn KeayChina: A History ↗Editor's pickVideoSearch on YouTubeQin Shi Huang unification of China ↗Editor's pick