Warlord of the Apocalypse: Iron Legion

In the Great Hua Nation, Zhu Yanchen and his father encounter zombies on an ordinary Thursday afternoon while taking the bus home, making the 9-kilometer journey back extremely difficult. They must get back; their residential area is an artificial island, largely independent from its surroundings, and relatively safe. Besides, their loyal pet dog is waiting at home. The zombie outbreak is ferocious, and humanity pays a heavy price. However, with efficient organization and mountains of high-tech weapons, they manage to control the situation within months. But the virus is cunning; it begins to evolve and secretly hide among the population. A small number of evolved beings, indistinguishable from normal people, are known as the 'Myriad Heretics'—super heretics. Cannibals! The unsavable. They are extremely hard to eliminate, but fortunately, they are extremely rare. The 'Myriad Heretics' begin to infiltrate humanity's latest brain-computer interface and super AI projects. Survivors are forced to maintain extreme high-pressure control measures to avoid another large-scale infection incident. Human management systems undergo massive adjustments—strict and efficient, yet cruel and cold-blooded. People are classified into different levels based on skills. The power of the old era is gone. A new era of great contention has begun! — Description from novelcodex.org