For years, China had enjoyed a favorable balance of trade with foreign nations. But the British trade of Opium with China disrupted the economy in the early 1800s and led to wars between the two nations.
The illegal trade of Opium that Britain was having with China caused a deep disruption of society and economy, leading to the First and Second Opium Wars.
At present, zoning laws regulate those zones which can be used for developing commercial activity or for building residential areas; they also specify the placement, size and height of the structure.
But zoning laws were first designed to protect some districts by means of building walls around these cities. Outside the walls, poor people lived in deplorable and dangerous conditions, while inside this protection it was possible to find civic and religious places as well as the majority of the population.
