I can dive deeper into:

: Doctors and dentists who fled mainland China found refuge here, operating affordable clinics without British colonial licenses.

The Walled City was a marvel of anarchic vernacular architecture. By 1993, more than 300 interconnected high-rise buildings were fused together into a single, massive block.

The Walled City was a labyrinth of dark, narrow, and damp corridors, where sunlight rarely touched the ground. However, the book highlights how inhabitants created a sense of normalcy:

Today, the site is a peaceful public park, the , designed in the style of a traditional Jiangnan garden.