ASEAN Beat | Diplomacy | Southeast Asia

Interpreting the Future of Vietnam-China Relations Through the 2026 Joint Statement

The recent visit to China of Vietnam’s top leader To Lam could well mark a turning point in the sometimes fraught bilateral relationship.

China’s President Xi Jinping (left) and To Lam, the general secretary of the Communist Party of Vietnam, stand in front of the Presidential Palace in Hanoi, Vietnam, Apr. 14, 2025.

Vietnam and China issued a Joint Statement on the heels of the state visit to China of the Communist Party of Vietnam (CPV)’s Secretary-General To Lam, who is also Vietnam’s president. Spanning over 8,000 words, the statement focuses on strengthening strategic political trust between Hanoi and Beijing; deepening comprehensive cooperation in defense and security, economics, trade, investment, and education; enhancing multilateral cooperation; and resolving disputes in the South China Sea.

Unlike previous joint statements, the 2026 document reflects a shift from traditional diplomatic rhetoric toward substantive cooperative diplomacy with measurable KPIs. This could have a substantial impact on the direction of Vietnam-China relations in the years to come.

In addition to emphasizing alignment in politics, institutions, and ideology, as usual, economic and trade cooperation remains the “cornerstone” of the relationship. This is built upon strategic connectivity, particularly in terms of railway infrastructure and digitalization, but operated within a strict risk management framework through cross-border security measures as reflected throughout the bulk of the Joint Statement. Accordingly, both countries underscored their absolute priority on railway infrastructure and the digital economy.

While the development of railway connectivity was only part of the strategic connectivity agenda discussed between Vietnam and China in 2025, this time it is nested within a more comprehensive plan of advancing economic cooperation and bilateral trade. These also include the development of logistics services and the establishment of transit hubs, cross-border economic cooperation zones, and multimodal transport. This reflects a shift in thinking, from merely laying railway tracks to building a comprehensive economic ecosystem along the railway corridor.

Vietnam–China cooperation in 5G telecommunications technology has drawn concerns from the United States, and has to some extent brought US–Vietnam telecom infrastructure cooperation to a near-complete halt following Vietnam’s welcome rendered to the Chinese tech giant Huawei to provide its 5G services and cooperate with leading local telecommunication companies like VNPT and Mobifone. Cooperation in 5G technology was “welcomed” in the 2025 Joint Statement, issued during President Xi Jinping’s visit to Hanoi last April, but was “supported”  in the 2026 Joint Statement, suggesting a greater level of commitment. However, this cooperation is now tied to explicit preconditions, namely, that 5G cooperation take place “in accordance with the laws of each country,” “Vietnam’s international commitments,” and notably, “ensuring mutual data security and cybersecurity.”

A new element in the 2026 Joint Statement is that economics and security are no longer treated as two separate domains but as mutually reinforcing ones. This represents a new model of cooperation, in which economy and security are interwoven and positioned as a guiding principle in bilateral relations. Any increase in economic commitment is accompanied by corresponding security assurances, treating major infrastructure projects as part of national security, and conversely, using security as a foundation for a stable environment for development. The concept of security within Vietnam–China bilateral cooperation encompasses both traditional and........

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