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In page Wuxing (Chinese philosophy):

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In traditional doctrine, the five phases are connected in two cycles of interactions: a promoting or generative ( shēng) cycle, also known as "mother-son"; and an overacting or destructive ( ) cycle, also known as "grandfather-grandson" (see diagram). Each of these cycles can be interpreted and analyzed in a forward or reversed direction. In addition to the aforementioned cycles there is also what is considered an "overacting" or excessively generating version of the destructive cycle.[citation needed]