China accounted for 25% of the world's wealth and about one-third of its population.
Han Dynasty: The Han Dynasty rivaled the Roman Empire in terms of technology and wealth. China accounted for 25% of the world's wealth and about one-third of its population. The imperial examination system and a meritocratic governance system were established. They expanded their territory to its greatest extent. Notable inventions include the crossbow, repeating crossbow, and seismometer. Vietnam and Korea were conquered and given Chinese civilization.