Era: My Sister Took Away My Genius Baby

In the 1970s, my sister and I gave birth at the same time. She traded her useless son for my genius son because of the value of mother to son. Twenty years later, my son became a national treasure-level scientist. The leader sent a special car to take her to the capital to enjoy the day. She came here specifically to stimulate her good-for-nothing son, saying that it was all my fault as a useless mother who failed to raise him well and ruined his life. My lame son took a knife and chopped me to pieces. Only after my death did I find out that my sister was a book girl. She had known that my son was a genius and deliberately exchanged it with me. I refused to close my eyes, and when I opened my eyes again, I was back to the day of delivery.