Can I really see through the Book of Changes? Fate and life and death?

That was not the case. What it does is to make certain predictions about things, and the predictions it makes are not completely consistent, because the Book of Changes thinks that everything is changing (this change has an internal law like the natural seasons, and the Book of Changes uses this law to predict). Similarly, numerology is also changeable, so it cannot be completely predicted. Life is still in your own hands, try your best to listen to destiny.