青云翻译

Therefore, China's foreign trade policy must be based on changes in the political and economic situation in those countries or regions are subject to change.

Therefore, China's foreign trade policy must be based on changes in the political and economic situation in these countries or areas and subject to change.

Therefore, the Chinese foreign trade policy must act according to these national or the local political economical circumstance change has the change.

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Therefore, China's foreign trade policy must be based on changes in the political and economic situation in these countries or areas and subject to change.