This article uses the Belt and Road Initiative (BRI) to examine the asymmetric relationship between China and Kazakhstan under a proposed framework—symmetric interest. It breaks from the domination–submission, divergent stakes, interests, patterns, and misperception perspectives characterizing asymmetry to show how asymmetric relations in a non-external security context elucidate peaceful relations. Under what conditions do asymmetric relationships defy misperception and confrontation to produce peaceful cooperation? How is the BRI likely to manage China's asymmetric relationship with Kazakhstan? The study argues that asymmetric relations within domestic security and other non-external military security issue areas engender peaceful cooperation. This peaceful cooperation emerges because the stakes and interests of the parties become more symmetrical in absolute terms; thus managing misperceptions and associated confrontation. We propose a framework of symmetric interest and employ the cases of China and Kazakhstan to test the hypotheses and support the conclusion. Beyond providing an alternative perspective in the asymmetry literature, we lastly offer a discussion of the policy relevance.