The system in a post-apocalyptic novel was based on how many times a person's physique was. The protagonist was reborn before the apocalypse. He had a sister who was poisoned by radiation.

I recommend the following apocalyptic novels to you: "Doomsday's Favorite: Reporting to Young Master Wei, I've Reborn","When the Doomsday Calamity is in Progress", and "On the Eve of Returning to the Doomsday, I've Hoarded Ten Billions". They all met the requirements of the question. The protagonist was reborn before the apocalypse and told the story of the female protagonist robbing the commander's husband in her previous life, the survival story of a girl before the apocalypse, and the story of the female protagonist seizing the opportunity to use the space to start a crazy hoarding mode. I hope you like my recommendation. Muah ~

The book," The Nine Yin Tactics," was written by the author, Jun YSChu, and it was a novel about the romance between the Xianxia and Wuxia. The general plot of this novel is as follows: The Art of Nine Yin was an ancient divine book. Legend had it that it could change the heavens and defy fate. Therefore, it attracted many forces to compete for it. One by one, vivid and full of personality characters began to unfold the picture of love and hatred. ---------------------------- " After Rebirth, I Became the Prince Regent's Favorite " was an ancient romance novel written by the author, Nineteen Yi. The general plot of this novel was: As a Nian King and a Celestial Sect magnate, Chu Tiange had been reborn, but he had become a good-for-nothing? The vicious stepsister bled every day and even made her eat pigs? Chu Tiange pressed down with his short hand and let her pig eat its fill! Was it hard to find a fake white lotus pill? She casually refined a pile of top-grade medicinal pills! An aristocratic family was possessed by an evil spirit and could not be saved? With a short kick, he sent Evil Spirit Nian flying! Who knew that Chu Tiange would become the team's favorite and a big shot with countless other identities! ---------------------------- Supreme Rebirth was a fantasy novel written by the author, Yeyue Yumeng. The general plot of this novel was: The Heavenly Dao was cold, and the Emperor was heartless. Who in the myriad worlds could compete with him? The peerless Martial Emperor, Qin Tian, was reborn in the body of a down-and-out young man. With the comprehension and experience of a Martial Emperor, he cultivated the Heavenly Emperor Technique, awakened the Devouring Martial Meridian, and the Kun Peng Martial Meridian, returning to the peak of the world! ---------------------------- 'Peerless War Reverent' was a fantasy novel written by Ji Jiu. The general plot of this novel was as follows: The eight divine generals of the celestial heavens and the ten Yama Kings of the underworld. Chu Yingtian was unrivaled in Xuantian Great World, he was chosen by the celestial heavens at a young age and was conferred the position of the Eighth Divine General. However, because of a conspiracy, someone had stolen the sky and swapped the sun. His remnant soul had drifted for many years and was reborn in Chu Kong's body. From then on, the world was turned upside down and it was out of control… ---------------------------- The God Slaying Emperor was a fantasy novel written by the author Xuan. The general plot of the novel was: In his previous life, he had saved the people in distress, but he had been betrayed by everyone and died by self-detonation. After his rebirth, Xuan decided to be the Bloodthirsty Demon King! Wielding a three-foot-long demonic saber! Cultivate the Soul Blood Curse! The Chaotic Continent was at peace! Kill those who abandon us and behead those who betray us! Ascend to the world and avenge the past! ---------------------------- The Undying Celestial was a fantasy novel written by Desert Smoke. The general plot of the novel was: After experiencing the bitterness of life, when the wind and clouds changed, when he soared above the nine heavens again, it would be the time for him to settle his debts! Chu Tian, once a proud son of heaven, was now trash. He was so weak that he could even bully an ordinary outer sect disciple. Because of an accident, he rose again! ---------------------------- " Defying the Nine Heavens " was a fantasy immortal cultivation novel written by the author, Shui An Tianchen. The general plot of this novel was: Qin Tian, the son of the heaven defying bead, changed his fate to return to the Jiutian god clan and swept across all the geniuses of the seven worlds. With the heaven-defying divine map in hand, he could slash the heavens and destroy the earth, kill gods and destroy demons, and be invincible! ---------------------------- " The Peerless Martial God " was a fantasy novel written by the author, Radian. The general plot of this novel was: Chu Yang had been reborn for 16 years. His aptitude was originally ordinary. However, he recalled the memories of his previous life and awakened the Twin Fate Martial Souls-one Yin and one Yang, one positive and one negative, a genius and a fool, a god and a demon. With the two poles in hand, the path of martial arts would no longer be a blur, and fate would no longer be ethereal. Starting from the East Barren, reaching the East Continent, coming to the Divine Dynasty, stepping into the Divine World, being unrestrained, laughing and scolding, acting according to his heart, teasing unparalleled geniuses, despising supreme existences, teasing beautiful women, my lord rises and falls! ---------------------------- Battle God Qi Tian was a novel about urban life written by the author, Wang Zha. The general plot of the novel was: Ten years ago, when the Chu family was destroyed, Chu Tianze fell off a cliff and lived a good life with Ye Anran. However, this woman betrayed her and abandoned her children, causing Chu Tianze to fall into the abyss of the Asura! Ten years later, Chu Tianze was bathed in blood on the battlefield. He returned as a god, bearing a blood feud and vowing to send all those who owed him to hell! ---------------------------- " Exposed Past Life, Ten Heavenly Emperors Cry on the Spot " was a fantasy novel written by Salted Fish, the author of the novel. The general plot of the novel was: Chu Feng had transmigrated to the Xuanyuan Continent and awakened the Ten Lives Reincarnation System. In his first life, he was a beggar. In order to repay his benefactor's kindness, he took his benefactor's only bloodline and fled to the ends of the world. He ventured deep into the desolate mountains and forbidden areas, exchanging his life for hers, changing the girl's fate against the heavens. In his second life, he was just a small soldier. When the enemy invaded, he threatened to kill all of them. He fought alone against tens of thousands of troops and fought until he bled to the last drop of blood, saving the people of the city. In his third life, he was the son of a family of generals. He guarded the border and fought many enemies. He won every battle and was engaged to the most favored princess of the current dynasty. The enemy nation threatened to hand over Chu Feng and send the princess to marry him. They would not invade again for a hundred years. The villain was causing trouble, and the emperor was fatuous. He threatened him with the lives of his entire family. He charged forward alone…In his tenth life, the person he had helped in his previous life had already become a Heavenly Emperor. He was framed as a demon spy and was hunted down by tens of thousands of people. In the end, he became a Heavenly Emperor, but he was besieged by many Heavenly Emperors and died. At this moment, the memory of ten reincarnations was exposed…

The protagonist was reborn into the body of a useless person from a family of ability users. His sister seemed to also have sound wave abilities. The story happened at the moment of the end of the world. The protagonist obtained a powerful ability through a series of events and survived in this turbulent world. The protagonist was reborn into the body of his family's trash, which allowed him to start an unusual life. He realized that his ability was not as powerful as he had imagined. Instead, there was still a lot to learn and improve. However, he did not give up. Instead, he continued to work hard to cultivate and continuously improve his strength. The protagonist's sister was also a sonic ability user. Her ability was similar to the protagonist's, and there was a special relationship between the two. With the protagonist's encouragement and help, the younger sister began her own adventure and provided the protagonist with a lot of valuable experience and help. In this apocalyptic world, the protagonist, his family, friends, and sister faced all kinds of difficulties and challenges together. Not only did they need powerful abilities, but they also needed courage, wisdom, perseverance, and unity to survive in this dangerous world.

I recommend " The Insulator of Doomsday " to you. The main character is a humble fatty who has been invaded by an unknown energy in the apocalypse and has become a new human who has not fully evolved. This fatty had grown up on the path of the apocalypse and was faced with a choice. In short, it was very exciting! I hope you like my recommendation.😘

😋Dear, seeing your needs, I have a few apocalyptic novels that I can recommend to you! The first was the "Doomsday Foodie System". The female protagonist was imprisoned because of the failure of her superpower awakening. However, she obtained the Super Foodie System at the time of danger. From then on, she lived a good life in the apocalypse. There was also "Reborn in the End of the World", where the female lead, a top-notch rich and beautiful woman, was reduced to cannon fodder. However, before she was reborn and returned to the end of the world, she found out that her illegitimate sister was actually a transmigrator! There was also the spiritual residence space of the immortal cultivators. The female protagonist began to take revenge. The female leads are all strong and fresh meat, and they are super scheming! I hope you like it, Muah ~😗

I recommend the novel "Rebirth: The White Lotus Female Supporting Character" to you. The protagonist had transmigrated into the white lotus in the book, and the apocalypse was about to come. Fortunately, God had given him a golden finger. He had clung to the thigh of the mysterious strongest person in the future, and his life was simply perfect. Not only did she successfully reincarnate before the apocalypse, but she also conquered all the female powerhouses in the apocalypse in her previous life. I hope you like this fairy's recommendation. Muah ~😗

😋I recommend "Back to the End of the World: A Beauty Like a Knife". The male lead, Bai Su, returned to the end of the world and brought the system along with him to embark on a thrilling adventure. I hope you like my recommendation, Mwah ~😗

😋I recommend the following novels to you: 1. " Sunny Day After the End of the World ": The female protagonist transmigrated to become a passerby in the end of the world. She brought the shop system and grew up in the end of the world. She adhered to the practice of being independent. 2. " The Bloodthirsty Phoenix of the Rebirth Apocalypse ": The female lead, Song Liran, transmigrated and became the female lead of the original text. She transmigrated and was reborn again. She walked towards revenge with her special ability and maintained her original heart. 3. " The Grey Age of Doomsday ": The female protagonist, Liu Moxi, obtained the Grey Yuan System. In order to survive, she began to build her own life and live with her family. 4. " Rebirth brings the space to the end of the world ": The female protagonist brought the space to the end of the world, bringing her teammates and explosive power to wander in the end of the world. The above novels are all novels with the female protagonist in the post-apocalyptic world with a space system. The plot is rich and interesting. I hope you will like this fairy's recommendation.

I recommend "The Rise of the Female Supporting Character Reborn in the Apocalypse". The main character was also reborn back to before the apocalypse. At the same time, there was a similar plot in her life where her roommate turned into a zombie. The plot of the novel is suitable, and the author's writing is exquisite and moving. I recommend it to you. I hope you like this fairy's recommendation. Muah ~😗

I recommend 'Doomsday Scarlet Lord' to you. The plot of the novel described a patient with severe blood-sucking disease who was given a chance to be reborn because of a text message. He devoured blood in the apocalypse and became the unique Lord of the Scarlet. This matched the protagonist's situation as described in the question, and the plot was very compact and exciting. I hope you like my recommendation, Mwah ~😗