The Trade Trap: Cross-Strait Economic Integration and Its Strategic Implications
Taiwan’s largest trading partner is the People’s Republic of China. By a significant margin. The two sides of a strait that are separated by competing political claims, opposing military forces, and seventy-five years of antagonism trade more with each other than Taiwan trades with the United States and Japan combined. This fact sits at the center of the Taiwan strategic problem in a way that military analysis consistently underweights: the economic integration that has developed between Taiwan and China since the 1990s has created dependencies that shape the behavior of Taiwanese businesses, the political calculations of Taiwanese voters, and the investment decisions of multinational companies with operations on both sides.
The integration began in earnest after the late 1980s, when Taiwan lifted restrictions on investment in mainland China. Taiwanese manufacturers — electronics assemblers, footwear companies, apparel producers — moved labor-intensive production to Guangdong and Fujian, taking advantage of lower Chinese wages while maintaining design, marketing, and higher-value functions in Taiwan. The result was a supply chain integration that made the two economies simultaneously competitive and interdependent. Taiwanese components went into Chinese manufacturing. Chinese-assembled products went into global supply chains. The profits flowed partly back to Taiwan. The arrangement suited both sides for decades.
The political economy of this integration has consistently created friction with Taiwan’s defense posture. Taiwanese businesspeople with factories in China — the so-called “taishang” — have interests in cross-strait stability that do not always align with the interests of defense planners who want a more confrontational posture toward Beijing. This constituency has historically been associated with the Kuomintang party, which has generally taken a softer line on cross-strait relations than the Democratic Progressive Party. Chinese influence operations that target this constituency — through business incentives, preferential treatment, and selective enforcement of regulatory requirements on Taiwanese-owned factories — are designed to translate economic dependency into political pressure on Taiwanese policy.
The decoupling that has been underway since roughly 2016 reflects both Taiwanese political decisions and the changing economics of Chinese manufacturing. As Chinese wages rose, the labor cost advantage that drew Taiwanese manufacturers to the mainland diminished. As political tensions increased, the political risk premium on mainland investment rose. As supply chain resilience became a priority for global corporations after the COVID disruptions, diversification away from China became a business objective rather than merely a geopolitical one. Taiwanese investment in mainland China has declined. The trade relationship remains substantial.
The semiconductor dimension of cross-strait economic integration is the most strategically sensitive. TSMC and other Taiwanese chip companies have subsidiaries and sales operations in China. Chinese technology companies are among TSMC’s largest customers. The chip supply chain connects Taiwanese producers to Chinese consumers in ways that are difficult to disentangle without disrupting both sides. American pressure on TSMC to restrict chip sales to Chinese technology companies — most prominently the restrictions on supplying Huawei and other designated entities — has been forcing a partial decoupling in the semiconductor sector that China regards as economic warfare and that the United States regards as technology security.
The economic relationship does not prevent conflict. It does raise the cost of conflict in ways that are visible to decision-makers on both sides. A PLA military operation against Taiwan would destroy the economic relationship that has sustained significant portions of both economies for decades, disrupting supply chains that now extend throughout the global economy. This cost is real. Whether it is sufficient to deter a Chinese leadership that places paramount importance on political objectives — unification, the prevention of formal Taiwanese independence — over economic ones is the question that the economic relationship alone cannot answer.
Money does not guarantee peace. It raises the price of war. In the Taiwan case, the question is whether that price is high enough.