Before the end of the extreme cold, Chen Yan discovered an anomaly in the numerical simulation room of the meteorological center. The movement trajectory of the polar vortex showed a deviation that was rare in a century. The global atmospheric circulation model displayed a red screen warning for a week in a row. The simulation results pointed to a sustained global extreme cold, with the lowest temperature possibly exceeding minus 120 degrees Celsius. He reported it to his leadership, but it was considered that the model was wrong and he was questioned and denied. Most of his colleagues in the industry were also skeptical. Only a few old friends were willing to exchange data privately. Chen Yan repeatedly checked the calculations late at night to confirm that the model was correct, and realized that this crisis was a life and death test for human civilization.
