With a Spatial System, Nothing Can Stop Me on the Road to Escape Famine

[Transmigrate into a Book + Flight from Famine + System + Pocket Dimension + Strong Heroine + Farming + One-on-One Romance] Shen Wangshu was a renowned young doctor at a hospital specializing in integrated Chinese and Western medicine. After finishing an operation, she went mountain climbing to clear her head, only to accidentally kill herself on the way down. She transmigrated to a dynasty that had never existed in history. When she woke up, she discovered that not only had she transmigrated into the body of a girl who looked exactly like a minor cannon-fodder character in a book, but she'd also transmigrated into the book itself. The girl had led a truly miserable life. The original owner also had two younger brothers to support. With disasters and misfortunes piling up, it was no problem: she had a pocket dimension, a System, and plenty of supplies, so she could eat and drink well along the road as they fled the famine. The reborn heroine had the luck of a koi, and the supporting female character had the plot in her hands. She wasn't afraid, either: she had a golden finger of her own. They'd ride through natural disasters and race along the official roads... With wars raging everywhere, she'd wield modern firearms and sweep away thousands upon thousands of soldiers... I'm terrible at writing blurbs, so please read the story. Thanks! I hope you won't connect the events in this novel to the plots of other novels. It would make me sad. Thanks for understanding. [An alternate history setting, no need to overthink it]