On this day in the year 2419, the human body has been generally transformed. Inspired by natural evolution, the human general government developed a virus called Double S to partially change the gene chain in human cells, allowing the human race to evolve on the original basis and become stronger. Most viruses have become ineffective against humans, and the longest human lifespan has reached 153 years. Even so... The problem of the world's low population after WW3 still cannot be solved, because WW3 caused the activity of many women's reproductive organs to decrease and there was no birth rate. The research institute of Peishi Tianfei Company is conducting a secret project - genetically combining humans. Randomly select the health genes of a number of people from the world's 1.5 Billion population, extract a certain part of the gene, combine it according to the genetic framework of a normal person, form chromosomes, and then inject the nuclei formed by these chromosomes into anucleate egg cells for cultivation. Ten months later, they got their first successful test product: Pei Whisper. In order to commemorate the genetic cloning achievements of their ancestors, they gave him the code name "Lamb".