in vietnamese culture, the yangtze giant soft-shell turtle stands for kim qui, the great turtle god. in the story, the dragon king gave a special sword called heaven's will to a vietnamese hero. the hero was emperor lê lợi. emperor lê lợi used heaven's will to free vietnam from the chinese. then emperor lê lợi had to give heaven's will back to the dragon king. he gave it to kim qui to give to him.