Final answer:
The author shows Jin Wang's teacher reinforcing a racial stereotype to highlight the widespread occurrence of racial biases and stereotypes, influencing one to critically examine such prejudices in society.
Step-by-step explanation:
The author showcases Jin Wang's teacher reinforcing a racial stereotype to illustrate the pervasive nature of racial stereotypes and the impact they have on individuals' perceptions. This literary decision serves as a reflection on the real-world context where racial biases and stereotypes are deeply ingrained in society. Through these representations, readers are encouraged to think critically about their own assumptions and the ways in which stereotypes affect those around them. It's not merely to emphasize the teacher's ignorance or to depict the character negatively, but rather to provide a commentary on a broader societal issue that extends beyond the classroom and into the systemic structures of power and discrimination.