"My heart is like a scale" analyzes the role played by the old shopkeeper and the characters of the new wife.

As a foil to the novel of the old shopkeeper, the dishonesty of the old shopkeeper is in sharp contrast with the honesty and foresight of the new wife. Highlights the main characters in the novel. The behavior of the old shopkeeper promoted the development of the plot of the article. Only when the old shopkeeper asked the master of the star scale to star fifteen and a half scales did the new wife ask the master of the star scale to star sixteen and a half scales, and only when the old shopkeeper showed off his cleverness did the new wife solve the mystery. At the same time, it explains the theme of the novel-honest business.

The new daughter-in-law is an image of being independent, discerning, good at dealing with interpersonal relationships, honest in business and principled in doing things.