This article explores how multilateral negotiations for technology trade accelerated the fall of the Cold War economic divide in East Asia. Drawing on archival sources in Japan, the United States, China, Britain, and France, it focuses on computer trade between China and capitalist countries from 1968 to 1980. The computer, a dual-use technology essential to China’s industrial and military modernisation, was at the centre of debate among capitalist countries. While competing to export advanced technologies to the China market, they needed to relax export controls through the Coordinating Committee for Multilateral Export Controls, an international regime to oversee export restrictions on communist countries during the Cold War. This combination of competition and cooperation weakened the restrictive trade regime dating back to before the Korean War, enabling capitalist countries with diverse economic and security interests to find common ground to sell to Chinese customers. By examining this process, this article reveals that dual-use technologies, often viewed in global history as a source of division among states, could in fact promote economic and political interactions across the East-West divide.