How to break the superstition of boyfriend's parents?

If you believe in life, you will have it; if you don't, you will have nothing. The previous generation was superstitious to some extent. As you said, superstitious thoughts are deeply rooted. You should impress them with your true feelings, prove to them that you love them deeply, and explain the science of 2 1 century to them, so that they can broaden their horizons. Otherwise, find a famous fortune teller and take the exam again, because the results of each fortune teller should be different. It may take a long time to influence them, so you have to be patient.