In the early winter morning, gray haze shrouded the city like a thick veil. The fog was thick and the air was filled with the smell of industrial waste gas and car exhaust. Li Hao stood at the window of the hospital building, looking at the busy city streets in the distance, feeling vaguely uneasy. The city is still running as usual, pedestrians are rushing, vehicles are passing by, and the urban business district is still bustling with people. But Li Hao knew that this tranquility was only temporary. Friction among major countries around the world is increasing day by day, and the shadow of nuclear war seems likely to fall at any time.