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1·Five, exert comparative advantage, optimize the structure of foreign investment, promote upgrading of the industrial structure.

发挥比较优势，优化外贸外资结构，推动产业结构升级。

2·However, according to the actual situation, it is rarely that using mathematical models to optimize the utilization of foreign investment and the structure.

但是根据引资国的实际情况，运用数理模型进行优化利用外资结构的并不多见。