Chain index an index number derived by relating the value at any given period to the value in the previous period rather than to a fixed base.

环比指数指通过把某一时期的数值与前一时期的数值相比，而不是与固定基期相比而得出的指数。

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It points out that mutual value is the base for the parties to merge. The profit of the merged enterprise will not be made until a certain period of time.

研究发现，共同价值是双方实现各自并购战略目标的基础，企业并购收益需要经过一段时期才能实现。

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