Clara Fong and Lindsay Maizland

Introduction
China and Russia have a long, complicated history together, marked by periods of both cooperation and fierce strategic rivalry. The neighbors have strengthened ties over the past decade, but some experts question the depth of their strategic partnership, arguing that the countries’ alignment is driven more by their common rivalry with the United States than by any natural affinity.
In the past, bilateral tensions have flared over issues including communist doctrine and the countries’ extensive 2,600-mile (4184 kilometers) shared border. Since the turn of the twenty-first century, however, the China-Russia relationship has improved substantially. The two formally resolved their border dispute in the 2000s and now exercise greater security cooperation through joint military drills and arms deals. Moreover, their economic relationship has blossomed in the face of Western sanctions against Russia as Moscow shifts trade away from Europe. China and Russia also coordinate within and across international institutions to challenge the norms of the U.S.-led world order.
However, challenges remain. While joint security exercises have increased, the two militaries do not exhibit interoperability. The economic relationship has deepened, but it remains highly asymmetrical. And on the diplomatic front, China and Russia coordinate in established and new international institutions, though they do not share the same vision of world order.
Are China and Russia allies?
China and Russia are not formal treaty allies and are not bound to come to the other’s defense. Nevertheless, their emerging strategic partnership has caused alarm in Washington. During a state visit to Stockholm, Sweden in September 2023, U.S. House Foreign Affairs Committee Chairman Michael McCaul (R-TX) called the burgeoning China-Russia security alliance the most “large-scale” threat that Europe and the Pacific have faced since World War II. At a meeting in February 2022, days before Russia invaded Ukraine, Chinese President Xi Jinping and Russian President Vladimir Putin said their partnership has “no limits” [PDF] and vowed to deepen cooperation on various fronts.


















