Part 2/11:

At the very surface of Beijing’s roadways, fine-grained asphalt and essential layers of materials support the city's infrastructure. Beneath the streets, a complex network exists, comprising gas pipelines, electrical cables, and water supply lines, which collectively form the dynamic nerve center of this thriving metropolis.

As we descend further, multi-utility tunnels come into view, harboring a variety of essential services in one centralized system. At 2 to 5 meters deep, these tunnels simplify the maintenance of utility systems amid the dense urban environment. Notably, above these underground facilities, remnants of Beijing's rich history coexist, with archaeological finds shedding light on ancient agrarian societies that once thrived in the region.