In this seemingly normal world, the sun still shines leisurely in every corner, the streets and alleys of the city are bustling, and people are busy with their lives as usual. Office workers hurriedly shuttled between high-rise buildings, rushing to meetings one after another, or burying themselves in piles of documents; street vendors shouted enthusiastically, selling their products, looking forward to earning more hard-earned money; children carried schoolbags, laughing and playing towards school, with innocent smiles on their faces. Everything seemed so harmonious and orderly, as if such peaceful days would last forever. No one expected that a doomsday catastrophe was about to come. The huge crisis hidden in the dark is like a dormant giant beast, silently opening its bloody mouth, preparing to swallow up all the good things in the world, while people who are unaware of it are still busy in their own small world with the trivial matters of life.
