Resident Access Control

Enter Access Password

Log in to enter the Underground Unified Digital Currency System homepage and access the account, exchange, credit lending, and task marketplace modules.

World Bank
Underground Unified Digital Currency Platform
Underground Economic Core

Underground Unified Digital Currency System

Building a stable, unified, and traceable economic foundation for the early underground civilization of The Wandering Earth. This prototype website demonstrates the logic of new currency issuance, exchange, accounts, payments, credit lending, and task collaboration.
Core Currency
UEC
Unified Earth Credit
∪E
Active Underground City Nodes
128
Synced normally today
Daily Settlement Volume
9.2M UEC
Up 4.8% from yesterday
Central Reserve Stability
97.4%
Resource backing is sufficient
Risk Alert Level
Low
System status stable
Important Notices

System Alerts & Updates

A centralized view of real-time exchange rates, system upgrades, and task reminders related to resident accounts.
Real-time Exchange Rate Changes Rate Update
The reference exchange rates for USD, AUD, and EUR have been updated based on the underground city resource value model. Please refresh the calculator before exchanging.
2 minutes ago
System Audit Upgrade System Maintenance
Tonight, from DST 22:00–23:30, central ledger synchronization will be optimized. Some transactions may be posted with a delay during this period, but none will be lost.
Today
Task Reminder Task Marketplace
Your favorited task “Resume Writing and Document Organization” has new applicants. The deadline is in 2 days and 6 hours.
Today
Credit Lending Alert Bill Reminder
There is currently 1 bill approaching its due date. If it becomes overdue for more than 3 consecutive cycles, a survival quota freeze alert will be triggered.
Past 24 hours
Monthly Spending Breakdown

Monthly Spending Donut Chart

Below is the main breakdown of registered spending for this month, helping you quickly assess your cost-of-living structure.
Total Spending This Month
1,860
UEC
Food 36% 669.6 UEC
Rent 19% 353.4 UEC
Utilities 23% 427.8 UEC
Clothing 12% 223.2 UEC
Other 10% 186 UEC

Contact & Support

◎
Support & FAQs
›
Emergency Aid Request›
Cancel Pending Transaction›
What Is Phishing Fraud?›
Service Updates & Availability›
Cost of Living Support›
Submit Transaction Appeal›
How to Activate the Resident Card?›
Complaints & Feedback›
📱
Contact Us
›
Send a message, call the virtual assistant, or contact a human specialist to quickly reach the right support channel.
🏢
Locate Us
›
Find the nearest offline bank, exchange counter, or underground city service specialist for manual review and physical asset exchange.

Currency Exchange

The unified digital currency is used to rebuild trade, resource valuation, and labor settlement in underground civilization.

Institutional Role of UEC

UEC is a central digital currency uniformly issued and managed by a global joint financial institution.
It does not rely on paper currency circulation or the credit of any single country, but instead serves the overall coordination of resources and transaction order across underground city society.
The system emphasizes stability, unified settlement, traceability, and coordination across underground cities.

Sources of Value

Legacy National Currency Conversion
Gold Reserve Conversion
Critical Resource Valuation
Labor Compensation Settlement

Issuance & Circulation Logic

1Submit legacy assets or resources
2Central system review
3Unified valuation conversion
4UEC credited to account
5Enter wages and transaction circulation

Exchange Center

This section contains two core functional modules: fiat currency → UEC exchange on the left and physical asset → UEC exchange on the right. Exchange calculators are shown at the top, with the corresponding live rate tables below.

Fiat Currency → UEC Exchange

All currencies are converted into UEC, the core currency. The system only accepts conversion from other currencies into UEC and does not support converting UEC back into the original currency.
Equivalent UEC Amount
6,800 UEC
1 USD ≈ 6.8 UEC(not a real exchange rate)
Exchange rates are based on the underground city resource value model and are for reference only.
Currency
Exchange Rate (→ UEC)

Physical Assets → UEC Exchange

Physical assets must be exchanged at a bank. Online services provide rates only.
Convertible UEC Amount
450 UEC
Gold: 1g ≈ 450 UEC (not a real exchange rate)
Online services display reference valuations only. Actual exchange requires manual review and must be completed at an offline bank.
Manual Review Request
You can enter important household items here. The system will submit them for manual review and return an estimated UEC amount, after which you can proceed to an offline bank for exchange.
The manual review request has been sent and is awaiting a response. Please watch for follow-up notices and bring the physical asset to an offline bank to complete the exchange.
Asset Type
Unit
Exchange Rate (UEC)

Account Center

A simulated personal account page for underground city residents, showing funds, quotas, and transaction activity.
Living Expenses
540 UEC
Updated this cycle
Energy Quota
78%
Remaining available
Oxygen Quota
64%
Remaining available

System Status

Identity VerificationCompleted
Main Ledger Sync98%
Risk ReviewLow

Recent Transaction Records

08:42
Labor Compensation
Underground City Engineering Department
+ 320 UEC
Completed
10:15
Resource Exchange
Oxygen Quota Refill
- 45 UEC
Completed
13:30
Cross-city Transfer
Hangar-07 / C-19
- 120 UEC
Processing
18:05
Daily Purchase
Underground Market Zone 3
- 28 UEC
Completed

Security & Governance

Shows how the system maintains identity management, ledger synchronization, anomaly control, and central governance.
🔐

Unified Identity Verification

Click to view your virtual ID card.

View
🗃

Central Ledger Synchronization

Click to generate a ledger of incoming and outgoing transactions.

View
📈

Abnormal Transaction Monitoring

Click to check whether you have high-risk transactions.

Run Check
⚙

Emergency Dispatch Mechanism

Click to check whether you are in a crisis state.

Run Check

Governance Structure

Global Joint Financial Institution: unified issuance and rulemaking
Regional Settlement Centers: inter-city clearing and audit execution
Underground City Management Terminals: resident accounts, quotas, and payment management

Credit & Lending Center

Four Core Sections
Real-time Central Ledger Sync
Overdue status affects survival quota priority

My Credit Bills

Current amount due + minimum payment due (simulated data)
Bill Center
Current Total Due
338 UEC
Minimum Payment Due
112 UEC
Remaining Available Credit
2,220 UEC
Bill summary is dynamically calculated based on Social Contribution Rating C+ and this month’s survival quota stability coefficient. Current utilized credit ratio 38.3%, and credit line updates will sync to the central credit record.
Risk indicator: if overdue for more than 3 cycles, a survival quota freeze will be triggered.

Installment Living · Interest-free Store

Essentials in 6 interest-free installments
Installments
Only residents with a Social Contribution Rating of D or above may use interest-free installments; overdue payments will cancel the interest-free benefit and add late fees.
To be updated: inventory logic, delivery routes, and supply tier notes can be added later.

Emergency Funds · Contingency Credit

Low-interest welfare credit / interest-free within 7 days
Emergency Line
Available Emergency Credit
840 UEC
Used / Total Limit
360 / 1,200
Pricing Rule
Daily interest rate 0.02%
Limit Progress30%
Total repayment due at maturity
180.00 UEC
The loan will sync to the central credit record. Overdue status affects survival quota priority.
Expand the 3 most recent emergency fund records

CloseShare · Shared Limit

Shared credit for essentials within close relationships
Shared Credit
Current Shared Limit Cap
900 UEC
Number of Authorized Recipients
2
Shared to Me by Others
410 UEC
Limits I Shared with Others
Limits Shared to Me
CloseShare Spending Records
CloseShare may only be used for essential purchases (food, water, medical care) and cannot be withdrawn or transferred; shared limits are included in the primary account credit score calculation.

Payments & Transfers

Initiate transfers on the left and view transfer history on the right; click any history record to auto-fill the same information in one step.

Make a Transfer

Name
ID
Transfer Amount
UEC
Note

Transfer History

Click any history record to automatically fill in the same recipient name, ID, transfer amount, and note.

Underground City Network

Shows economic circulation, resource links, and system coordination among global underground city nodes.
Global Underground City Node Network
Capital Flow / Clearing Flow / Resource Flow

Node Status

Beijing Underground CityLevel A
Population 2,430,000 · Energy Dispatch
System Load84%
Sydney Underground CityLevel A
Population 1,280,000 · Food Cultivation
System Load67%
Moscow Underground CityLevel B
Population 1,950,000 · Heavy Industry
System Load76%
Nairobi Underground CityLevel B
Population 930,000 · Water Cycle Treatment
System Load58%

Task Marketplace

A lightweight task trading page for ordinary residents. You can browse tasks, post tasks, favorite commissions you are interested in, contact posters, or apply to take orders.
Available Tasks
0
Updates live with filters
Favorited Tasks
0
Quick contact from details
Added in the past 7 days
0
Light services and offline errands together

Task List

Post Task

Fill in the title, content, amount, and time to publish. Task types may include errands, copywriting, translation, consulting, design, and document organization—common needs in underground cities.
After publishing, the task will appear under “My Posted Tasks” on the “Accepted Tasks” page and will show whether anyone has applied or taken your task.
My Accepted Tasks
0
Shows the tasks I have accepted
My Posted Tasks
0
See whether anyone has taken the task
Applications Received
0
Shows the latest applicant counts

My Accepted Tasks

My Posted Tasks

About Us

This website prototype turns institutional ideas from a science-fiction world into a visual and interactive digital platform.

Project Background

The project is based on the underground city society in The Wandering Earth and explores how humanity might rebuild a unified economic order after the old world’s monetary system loses its foundation.
The website prototype shows the naming, issuance, exchange, accounts, payments, network coordination, and governance security of the new currency.

Currency Design Logic

The platform manages UEC circulation through a central issuing authority and combines the task system, resource exchange, and account system to create a closed loop of value creation, distribution, and use. All transactions and exchanges are recorded and coordinated by the system to ensure fairness and efficiency.
As the unified digital currency of underground cities, UEC derives its value not from national credit or market fluctuations, but from survival resources and social contribution. Through a unified pricing system, the platform can maintain a stable exchange order in a resource-constrained environment.

Risk & System Governance

In a resource-limited environment, the system must address transaction risk, unequal resource distribution, and information security issues.
Therefore, the platform introduces review mechanisms, appeal processes, and behavioral monitoring to maintain stable system operation.

Project Significance

This project is not only a website prototype, but also an exploration of how society may be organized in extreme future environments. It asks: when resources become the central constraint, how should humanity redefine value and exchange?
At the same time, why is a unified currency needed? When surface assets lose meaning and national borders dissolve, the original currency system becomes difficult to maintain. As a unified digital currency, UEC enables efficient coordination and resource exchange among different underground cities.