Final answer:
The piano piece titles 'Pleading Child' and 'Perfectly Contented' symbolize Jing-mei's transformation from dissatisfaction to acceptance, reflecting her internal struggle and journey towards reconciling personal aspirations with parental expectations.
Step-by-step explanation:
The titles of the piano pieces 'Pleading Child' and 'Perfectly Contented' that Jing-mei plays at the end of the story symbolize the duality of her feelings and experiences. These titles reflect a transformation from a state of dissatisfaction, as suggested by 'Pleading Child,' to one of acceptance and satisfaction represented by 'Perfectly Contented.' This change signifies Jing-mei's journey toward reconciling her internal conflict between her own aspirations and the expectations placed upon her by her mother, as well as a larger commentary on the dichotomy between the struggle and fulfillment in life's pursuits.