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Differentiation refers to difference, which refers to the difference between oneself and others. It also refers to the differences in oneself at different times. Difference is the source of pain in this world, but it is also an important reason for the beauty of this world. Difference is the origin of all living things. Difference is the world. And people are just some elements struggling desperately under differences. When the pure white element gradually awakens under the endless differences, What color will it be? .