兩岸關係基本結構「政治疏離、經濟融合」，素有「經濟能否扭轉政治」之辯論。過去研究多直接討論經濟交流下的政治效果，卻較少對於經濟「如何」影響政治多加描繪，使政治效果產出之前經濟發揮之「潛移默化過程」未能清楚交代。為能釐清經濟如何發揮政治影響力，本文以兩岸經貿交流現況中，大陸著力甚深的「台灣農漁產品採購」政策，聚焦兩岸首次漁業契作：「學甲—上海虱目魚契作」，討論經濟影響政治的機制及其作用。根據本文研究，中共對台農漁採購政策效果並不在於立即性的扭轉台灣民眾的政治認同，而是以經貿交流作為降低敵意與培養互信的工具，關鍵在建立與台灣基層民眾的利益聯盟，紮根台灣南部基層民心，累積兩岸關係和平發展的社會經濟基礎。

Since the two sides of the Taiwan Strait restarted economic negotiations and signed a number of socio-economic agreements, there has been growing interests in the political implications of the economic linkage. While previous studies mostly illustrated various political outcomes of Cross-Strait economic exchanges, they tended to overlook how China can utilize its economic leverage to influence Taiwan. This paper argues that China’s preferential policies toward Taiwan farmers did not aim to alter Taiwanese identity in the short term. Rather, by analyzing how China contracted with Xuejia’s fish farmers in details, this paper shows that the increasing economic interaction may become a mechanism for enhancing trust and reducing hostility towards China among Taiwan’s general public. In short, Cross-Strait economic exchange may serve as a conveyor belt for ideas and establish coalition of interests for the people on both sides of the Straits.