Doomsday Wealth System

When Jiang Yan woke up, the world mutated, zombies besieged the city, and he was bound to a strange system. The system master is holding a small whip: earn points quickly and get crystals quickly. Jiang Yan was depressed: Other people's systems are cute and cute, but our own is a money-hungry man who takes risks with his eyes! I thought I was the strongest support, but who knew I was the hard-working worker!