Transmigrating to the 1960S, I Make a Fortune Trading Across Worlds

【Transmigrate into a book + alternate world + System + military marriage + devoted couple + island setting】This is an alternate world, an alternate world, an alternate world. We can't stress it enough!!! Disclaimer: This story contains many fictional elements and has little to do with real history, so please don't get hung up on the details. Su Ying, a girl from the apocalypse, is betrayed by her companions and transmigrates into a cannon-fodder character who doesn't survive three chapters. She was transmigrated before birth, but had no memories of her former life until now. Only when the moment of danger arrived did the System pop up and restore her memories. When she learns that the heroine wants to harm her, Su Ying's first impulse is to kill her. The System manages to stop her. The heroine is the chosen one, it explains. If Su Ying lays a hand on her, the backlash will fall on Su Ying instead. Fortunately, there is a way to deal with this chosen heroine, so Su Ying is relieved. First, she changes the fate that would have ended in her death and sends the educated youth who harmed her to a labor camp. Once she has dealt with her own predicament, she turns to her family. In her previous life, Su Ying was an orphan raised in an orphanage. In this era, she gets to experience the warmth of a family. She doesn't want to lose such wonderful relatives, so she changes their fates while trading with friends from other planes. She changes her family's misfortunes and makes a fortune through interdimensional trade. She also meets a man she falls for: a powerful figure from the original novel. Su Ying changes the fate that would have left him an amputee, allowing him to continue serving his country. As they spend time together, they both realize that they are the ones they want to spend the rest of their lives with.