Soul Sky Continent

Solar activity weakened sharply, and the earth entered a "mini ice age." Global temperatures have plummeted, with winter temperatures in areas north of 35 degrees north latitude generally falling below minus 50 degrees. Social order completely collapsed in the extreme cold - power grids were paralyzed, communications were disrupted, traffic was stagnant, and agricultural harvests failed. The old monetary system completely collapsed within three months, and barter became the mainstream method of transaction. In this disaster, a new hard currency quietly emerged - "cold currency". The issuance of cold coins relies on a mysterious underground organization, the "Cold Territory Alliance", which controls a very small number of satellite communication systems and underground printing networks that are still in operation. Cold coins are circulated in the form of physical banknotes, with six denominations: 1, 5, 10, 50, 100, and 500. There is a line of small words printed on the back of each cold coin: "In the face of cold, everyone is equal; in the face of survival, everything can be traded."