Now, in real life, we often meet people who are very close to us and suddenly show signs when something happens. This is the invisible connection between relatives. Did the dead relatives disappear completely? If you have lived in this world, there will be traces, and it is hard to say that it can be completely erased. If there are traces, it will have an impact on future generations, just the size of the impact.
You must try to change your destiny. The beneficial influence will only be your help. Help is useless if you don't act.
I recommend you to read this book, a very basic Feng Shui book: China knows Feng Shui.
Will give you a better understanding.