Isn't it just teaching?

Before coming here, Zhen Xiu has used her space for a better purpose. Since she knows that this world lacks spiritual energy and she can't use her powers anymore whenever she wanted to so so she has decided to use this remaining power for her revenge.

Even if she was alive now; given a new chance to live again but it was on the foundation of her clone's death. The princess does not want to play dirty by using everything for herself. It was the last thing that she could do for the sacrifice of the original Zhen Xiu who loved her husband Lu Jian truly.

After coming into this world she has realized the importance of love and family. Even though it did not bring any big changes in her but she was still able to see the reason behind her clone's death.