Cause & Context
Agricultural surpluses, artisanal manufacturing, and paper credit accelerated Song urbanization, rendering closed residential wards and curfews obsolete.
Epochal Overview
The Song dismantled ward walls and curfews, enabling 24-hour storefronts, bustling night markets, teahouses, and entertainment quarters (Wazi) in metropolises of over a million residents like Kaifeng and Hangzhou.
Key Figures
Court painter Zhang Zeduan captured this urban explosion in *Along the River During the Qingming Festival*, while Meng Yuanlao recorded its memories in *Dongjing Menghua Lu*.
Civilizational Impact
The Song commercial revolution removed feudal temporal and spatial constraints on trade, giving birth to the world's earliest modern urban middle class and consumer culture.