Transmigrated to 1970s, Found True Love

Jade transmigrates to 1970s novel. Reborn sister Sienna Yates steals Jade's engagement to Holt Wen, forcing Jade to marry Holt. Holt, a military officer, falls for Jade. Families exploit them. Jade unlocks a Dimension, earning income. Reborn Sienna marries Liam Lee, who has an affair with Sofia Xue. Sofia plots against Jade. Holt is promoted; Jade moves, cutting ties with families. Antagonists suffer. Jade and Holt have children, happy ending.