Quick Transmigration: My System is a Big Liar

In the third year of the apocalypse, when Jiang Lan was besieged by zombies, unwilling to become a walking corpse, she chose to end her own life. After Jiang Lan's death, her soul encountered something calling itself a system, which told her that as long as she went to the smaller worlds and completed missions, she could become a full-time employee of the Quick Transmigration Bureau and gain immortality. Having experienced the apocalypse, Jiang Lan longed to live more than anyone else, so she would do everything in her power for immortality. What happened to the cannon fodder counterattack system? How did it become a childbirth system? The reward for having children is survival skills? And they're usable for life? Jiang Lan: I might consider this...