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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 generating or creation ( shēng) cycle, also known as "mother-son"; and an overcoming or destructive ( ) cycle, also known as "grandfather-grandson" (see diagram). Each of the two cycles can be analyzed going forward or reversed. There is also an "overacting" or excessive version of the destructive cycle.[citation needed]