The answer to this question is subjective and is best left to individual readers. Either side of the argument can be adequately defended. The yin and yang is a relational subject and shows the duality of many things including the universe as a whole. The idea is that the universe and everything in it is governed by a duality that has two opposing or competing principles. Despite that competition, the two sides also complement each other. The symbol itself is an illustration of that idea. Both sides of the symbol press into the other side, yet the symbol as a whole stays symmetrical and perfectly circular. The symbol shows diversity and harmony at the same time.

While I do not think that the yin and yang symbol is perfectly situated to the story "Two Kinds," I do think it can serve as a symbolic image of the relationship between Jing-mei and Suyuan. The story "Two Kinds" is definitely focused on the diversity and discord that exists between the two characters. Jing-mei points out early on that her mother had a narrow view of what living in America might mean. Anybody could become anybody, and Jing-mei initially falls into that belief. Eventually she decides that being American means following her own path rather than her mother's path. This pits the two characters at odds with each other. There is a strong diversity that exists between the two women, and the symbol shows that through the color contrast as well as the two sides leaning into each other.

The harmony expressed in the symbol is less identifiable in the story. There is initial harmony between the two characters at first. Jing-mei really does try to be the prodigy that her mom wants her to be. They do work together for a harmonious result, but the majority of the story is about the discord between the two women; therefore, the harmony of the symbol is overshadowed by the discord it also emphasizes.