Háizi de chéngjiù yuǎn chāo fùmǔ, qīngchūyúlán ér shèng yú lán.
The child's achievements far exceed the parents' - indigo producing a deeper blue.
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From 《荀子·劝学》: 青，取之于蓝，而青于蓝 - the blue dye extracted from the indigo plant is more vivid than the plant itself. Xunzi's metaphor for how learning can raise a student above their teacher.
