Can My RV Be Upgraded in Rebirth of Doomsday?

RV system + cool writing + harem In his previous life, Lu Han died on the tenth month after the end of the world. He was not bitten to death by zombies, but died of cold and starvation. Huddled in the basement of an unfinished building, wrapped in a cotton-padded jacket taken from a dead person, with a hot water bottle in his arms that had long since cooled down, the last thought in his mind was: It would be nice if I could have another bite of something hot. When he opened his eyes again, he returned to the seven days before the end, and accidentally awakened the RV system. There was only 43,000 left in his bank card, his ex-girlfriend ran away with him because he was poor, and his ex-colleagues were waiting to see his jokes. But Lu Han knew that in seven days, meteorites would hit the earth, the temperature would plummet to minus 70 degrees, and zombies would crawl out of the frozen city. This time, he didn't want to die again. Online loans, zero-yuan purchases, and crazy stocking up.