The winter in Old Dunling appears exceptionally severe, with rising steam condensing into dew on the metal surfaces, forming frost in the cold temperature. People wear thick clothing, and under the illumination of the night lights, faint white vapor follows their breath, rising and falling.
Amidst the cold, there is an unprecedented heat beneath the surface. The heavy gate slowly opens, followed by the Thames River's water rushing in through the rusted passage, passing through several layers of filters before reaching several dozen meters underground. The massive volume of water pours into the scorching boiler, then the machinery rotates, and the heated gas rushes through the pipes.
This is the system spreading underground like a spider web, as the burning energy flows through its paths, finally pouring into the inverted deep well.