Emperor Qin builds burial tomb filled, which is filled with Terra Cotta soldiers and bronze chariots. Oil wells are drilled using bronze and bamboo to depths of over 1000 feet. Han Dynasty Establishes modern Chinese state institutes Confucianism as basis of education and admission to civil service that lasts for next 2000 years. Gun powder is invented. Silk road trade develops with Europe, Buddhism introduced into China.
Paper is invented, calligraphy and figure painting perfected.
4 AD, census 58 million. There are mass migrations to avoid conflicts. China re-unites and enters a peaceful period during Sui Dynasty. The Grand Canal and highway systems are built to unite country. Great Wall is repaired and expanded.