Its due ! why do you think adeline yen-mah chose to call her book "chinese cinderella".

Ifound this on google “what are motifs? a motif is a literary term that is an idea, object, or concept that repeats itself throughout a text. a motif gives clues to theme or reinforces ideas an author wants to emphasize.” i hope this for what your looking for

Look at the passages where the author describes the isolation and insanity that dr frankenstein has