Heaven's Rewrite

The Heavenly Dao is an antivirus program left by an ancient civilization. It scans the mortal world day and night, deleting anyone deemed 'redundant' or 'violating rules'. Ji Ling, an apprentice in a shantytown, is a blank in this system—his sister is judged redundant with only ten days to live. His only trump card is an illogical golden finger: Zero-Slot Underflow. The lower his status, the closer he gets to the system's weak points; the more he is demoted, the hotter his permissions become. Thus, from a lowly servant wiping dust at the tower's base, he is hunted, stripped of rank, and expelled from the immortal registry—all while inching closer to the key to rewriting the celestial laws. When the 'Reset Plan' is initiated, the Grand Arbiter Lu Chen hands him the list of 'who survives to the next era'. Ji Ling gives the maddest answer in the book—he refuses the pen and rewrites it. — Description from novelcodex.org