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Undercity
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Details
Original Name:地城 (dì chéng)Gender:NeutralKind:PlaceScope:Novel-specificStatus:ActiveSource:AIOccurrences:1541Chapters:649
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Context UptoCh. 3024
Wiki ModelGPT-5.6 Terra
Image ModelGPT Image 2.5
Updated
Biodata
| Feature | Details |
|---|---|
| Name | Undercity |
| Original Name | 地城 |
| Alias(es) | Underground City |
| Type | Subterranean human settlement |
| Occupation/Role | Civilian refuge, military stronghold, and administrative center |
| First Appearance | Chapter 4 4 |
Background
The Giant Beast Calamity rendered the surface exceptionally dangerous, turning much of the land into a hunting ground for Giant Beasts. Underground cities became the main refuge for human populations; many residents had lived without seeing daylight for years. 4 11
Guangling was the first Undercity encountered by Luo Yan. Its entrance was concealed beneath a lake: a tunnel rose from the water and connected to the shore before descending into the city. 4
Freedom City was likewise established beneath the ruins of a former surface capital after the Giant Beast Calamity. 2282
Infrastructure
Access and transit
- Guangling is accessed through a lake-connected tunnel that can receive vehicle convoys. 4
- Its interior contains elevated roads, high-rise buildings, and trains that travel between city districts. 4
- The underground cities began developing an Underground Transportation Network to improve connectivity. 506
- Surface transportation remains important to their economies, though the Kunlun United Merchant Alliance controls and taxes routes linking six underground cities. 1607
Urban design
| City | Documented features |
|---|---|
| Guangling | Built inside a cavern nearly large enough to contain a city; its high-rises, roads, trains, and military vehicles resemble a pre-Calamity surface metropolis. 4 |
| Qingmu City | Built among mountains and forests around an underground river; antique buildings line both banks, with white walls, gray tiles, carved lattices, and red-painted pillars. 906 |
| Ziyang City | Its Old City became densely overcrowded as stowaways arrived, with houses divided into smaller rooms and additional structures erected in streets and alleys. 2379 |
| Xing City | An ancient two-level underground city beneath the ruined surface city; its first level mirrors the surface layout and appears to be a mausoleum rather than a residential district. 2401 2404 |
Defense and Administration
- Underground cities are governed by City Lords and defended by Mecha Legions, security departments, surface corps, and local academies. 256 641 2484
- Guangling’s rooftops are equipped with turrets, while tanks and armored vehicles patrol its roads. 4
- Qingyang’s defensive structure includes multiple armor layers and a holographic sky screen. 256
- Academies can directly support city defense; during Qingyang’s crisis, Canghe Academy deployed three mechas to assist the Legion. 256
- Underground cities can hold Strategic Affairs Department contribution points, which may be traded or used to post missions. 738
Society and Economy
- Underground city life includes formal institutions such as mecha academies, Legions, engineering departments, and security bureaus. 4 256
- Older districts can become crowded centers for stowaways, criminals, informal housing, and unregulated commerce. 2379
- Guangling’s Old City has competing civilian organizations, including Black Owl, Nine Phoenix, Dark Blood, and Red Gate. 418
- Underground city governments may be compromised by commercial interests; the Kun Alliance reportedly secured cooperation in several cities through bribes and free passage for official vehicles. 1607
Major Incidents
| Incident | Chapter | Outcome |
|---|---|---|
| Qingyang Undercity crisis | 256 | A Chaos Linkage melted through successive armor plates and destroyed part of the city, leaving a deep crystallized pit and rupturing the holographic sky screen. 256 |
| Duan Kong City containment | 1125 | Zhou Yuhao activated the Profound Technique Duan Kong City, isolating the city and preventing Giant Beasts emerging from the Nameless Void from escaping. 1125 |
| Ziyang Old City evacuation | 2438–2471 | Residents were evacuated to lure Heavenly Ghosts into a combat zone, but transformed Chimei Beasts attacked evacuees. The subsequent battle nearly destroyed Ziyang Underground City, though most residents had been evacuated. 2438 2455 2471 |
| Xing City excavation | 2401–2404 | Luo Yan’s team discovered a preserved underground city beneath Xing City, whose murals and layout suggested it was built to preserve the souls or remains of the Ancient People. 2401 2404 |