BEIJING (Realist English). Since 2020, China has tripled its nuclear warhead stockpile to an estimated 600, a dramatic departure from its historical policy of minimum deterrence. Though still far below the 1,550 deployed warheads allowed under the New START treaty for the United States and Russia, the expansion marks a significant shift in Beijing’s strategic posture and long-term military ambitions.
“China’s trying to catch up because they’re very substantially behind, but within five or six years they’ll be even,” President Donald Trump said in February.
At the center of global concern is the uncertainty surrounding Beijing’s ultimate goal. Analysts identify three potential trajectories:
– Regional parity: With approximately 1,000 warheads, China could neutralize Washington’s nuclear advantage in Asia. This would increase Beijing’s ability to issue explicit or implicit nuclear threats in crises — especially around Taiwan — and reduce the escalatory leverage historically enjoyed by the United States.
– Strategic parity: Matching the 1,550 deployed warheads held by the US and Russia would allow Beijing to claim full peer status among the world’s nuclear powers. The Pentagon has projected that China could reach this level by 2035, aligning with Xi Jinping’s military modernization milestone.
– Full-spectrum parity or nuclear supremacy: Surpassing 3,700 warheads — the estimated total of US warheads, including reserves — would require China to match both deployed and stockpiled weapons. At the current pace of 100 new warheads per year, it would take until 2056 to reach that threshold. However, China could accelerate its production, as the US once did during the Cold War.
Industrial potential and strategic calculations
China’s manufacturing capacity — particularly in missile and naval production — suggests it could dramatically scale up nuclear weapons output if desired. Once factories are in motion, bureaucratic momentum and employment incentives often make it difficult to stop.
At the same time, internal pressures could constrain expansion. China’s civilian economy is slowing, and sustainment costs for aging military platforms are rising. Moreover, fear of repeating the Soviet collapse — driven in part by unsustainable military spending — still looms over Communist Party decision-making.
Beijing’s decision will also depend on the actions of other nuclear powers. If Washington and Moscow maintain strategic limits, China may aim for parity. If arms control breaks down — with New START’s likely expiration in 2026 — China may push further ahead.
Strategic ambiguity and nuclear signaling
Despite the expansion, Beijing refuses to acknowledge it is engaged in a nuclear buildup. It has provided no clear justification or stated target, and it remains unclear whether Xi himself has decided on an endpoint.
Nevertheless, China’s signaling is growing:
- In late 2024, Beijing conducted its first intercontinental ballistic missile (ICBM) test over the Pacific since 1980.
- In June 2025, official media published technical details about the DF-5B ICBM, showcasing increased transparency — albeit selectively.
Observers say this suggests a desire for strategic prestige and deterrent credibility, and may foreshadow gradual increases in transparency, especially if international pressure grows.
For Washington and its allies, the challenge is responding to Beijing’s buildup amid extreme uncertainty. The upcoming US National Defense Strategy, currently in development, will address the question of how to adapt to this emerging threat while managing parallel modernization needs in conventional forces.
The trajectory of China’s nuclear expansion will also influence the future of global arms control. The collapse of New START, unless a successor is negotiated, may create a vacuum that accelerates the global arms race.
