Hun Sen, Cambodia’s former prime minister and current Senate president, is widely recognized for his strong and consistent support of China. Throughout his decades-long leadership, he cultivated a close strategic partnership with Beijing, positioning Cambodia as a key ally in Southeast Asia. A cornerstone of this relationship has been Cambodia’s unwavering adherence to the “One China Principle.” This alignment has been noted internationally, with observers frequently describing Hun Sen as China’s closest friend in the region. The depth of this relationship has implications for regional geopolitics and Cambodia’s foreign policy. His continued influence, even after stepping down as prime minister, suggests this strong bond will likely endure.