Reborn in the 70s for Revenge

Mia Sutton, with superpowers, transmigrates into 1970, plotted against by stepmother and stepsister, sent to countryside. Awakening pocket dimension and superpower, she confronts family, reclaims inheritance for supplies. At Red Flag Commune, Heilongjiang, she's in a period novel. Uses pocket dimension resources, takes in orphan Cole Silas. Overcoming schemes, she builds house, establishes herself in 1970s.