Jing-mei wanted to show her gratitude to Mr. Chong. So with her mother's permission and her help she decided to give to her old almost deaf teacher the piano as a present.
Answer:
"Now there came a little 'flutey' bit--very pretty!--a little chain of bright drops. She was sure it would be repeated. It was; she lifted her head and smiled."
It allows the reader to see the action from the perspective of Miss Brill and to see her objectively.
It provides an opportunity for the main character to indulge in imagination.
Miss Brill views social interaction as a stage play.
Answer:
I'd say that this text is for the general public.