Why is Guangzhou one of China’s most densely populated urban areas?

Guangzhou’s high population density is the result of its long-standing role as a vital commercial and trading hub, combined with rapid economic development. Several key factors contribute to this density:

• Strategic Location: Situated at the head of the Pearl River Delta, Guangzhou has served as a primary gateway for foreign trade and influence since the 3rd century CE. This geographic advantage has historically attracted people and investment, fostering continuous urban growth.12
• Economic Reform: Following the adoption of economic reform policies in the 1980s, Guangzhou experienced sustained economic growth. Its designation as an open coastal city and its proximity to special economic zones transformed it into a major financial and industrial center.34
• Migration: The city’s economic success has driven a significant influx of people, including a large transient population of workers from other provinces seeking employment in factories and other sectors. Additionally, many "overseas Chinese" have returned to resettle in the area since the 1980s.5
• Urban Expansion: While physical barriers like mountains and waterways once restricted growth, the city has expanded rapidly in all directions, with most residents remaining concentrated in the central districts.52