Qin Shi Huang unifies China
The First Emperor imposes one script, one coin, one law

After conquering Qi, the last rival state, King Ying Zheng of Qin took the title Shi Huangdi, 'First Emperor'. He standardised script, weights, coinage and law and began the Great Wall, creating a unified Chinese state.
Wikipedia (Russian) · Wikipedia (English) · 3rd century BC
Meanwhile around the world (±25 years)
Europe
- 218 BC Hannibal crosses the Alps — 3 years later
- 216 BC Battle of Cannae — 5 years later
Alive at the time
- Archimedes (aged 66)
- Qin Shi Huang (aged 38)
- Hannibal (aged 26)
- Eratosthenes (aged 55)
- Liu Bang (Emperor Gaozu of Han) (aged 35)
- Scipio Africanus (aged 15)
- Empress Lü (Lü Zhi) (aged 20)
- Cato the Elder (aged 13)
- Modu Chanyu (aged 13)