In this life, Ning Tianlang was killed by the butterfly effect caused by Su Sigui's time-travel. If Su Sigui doesn't evolve to Level 9 in the future, humanity will lose its pillar.
That's because, in the later stages, only the Chinese Continent still harbors human civilization. Ning Tianlang is not merely a Level 9 New Human; he is a god in the hearts of humans. His presence and the title of "Level 9" give humanity the only shred of confidence when faced with the Zombie King.
He is really too important, like a beacon for humanity, the source of hope. Without this future Level 9 New Human, humanity would completely lose hope and have absolutely no chance of fighting against the overwhelming power of the Zombie King.
