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China-US Relations Explained: Why the World's Two Superpowers Are on a Collision Course

World · July 10, 2026 · Liam Chen · 8 min

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China and the USA are locked in a new Cold War over trade, technology, and Taiwan — here's why tensions are rising and what it means for the world.

The relationship between China and the United States is the most important geopolitical issue of the 21st century. The two countries are the world's largest economies (USA $27 trillion, China $18 trillion), the two largest militaries (USA 1.3 million active personnel, China 2 million), and the two most powerful nuclear states (USA 5,800 warheads, China 350+). They are locked in a new Cold War over trade, technology, and influence, with Taiwan as the flashpoint that could trigger a catastrophic war. Tensions are rising, and the world is being forced to choose sides. Here is everything you need to know about China-US relations — why they are deteriorating, what the key issues are, and what it means for the world.

The Rise of China

China's rise from a poor, isolated country to a global superpower is the most significant geopolitical shift since the end of the Cold War.

Economic growth

China's economy has grown from $1 trillion in 2000 to $18 trillion in 2024, making it the world's second-largest economy (after the USA, $27 trillion).

China is now:

• The world's largest exporter ($3.6 trillion per year)
• The world's largest manufacturer (28% of global manufacturing)
• The world's largest trading partner for 120+ countries (including the UK, EU, and most of Asia)

China's growth has lifted 800 million people out of poverty, the fastest poverty reduction in history.

Military modernisation

China has modernised its military, the People's Liberation Army (PLA), with:

• 370 warships (vs USA 290) — the world's largest navy by number of ships
• 3 aircraft carriers (vs USA 11) — with more under construction
• 2,000+ fighter jets (vs USA 2,400)
• 350+ nuclear warheads (vs USA 5,800) — growing rapidly
• Hypersonic missiles that can evade US defences

China's military spending is $292 billion per year (2024), second only to the USA ($877 billion).

Global influence

China has expanded its global influence through:

• Belt and Road Initiative (BRI) — $1 trillion invested in infrastructure (roads, ports, railways) in 150+ countries
• Economic aid and loans — China is the world's largest creditor to developing countries
• Diplomatic expansion — China has embassies in 180+ countries and is a major player in the UN, WTO, and other international organisations

China is challenging US dominance and offering an alternative model (authoritarian capitalism) to US-led liberal democracy.

The Key Issues

1. Trade war

The USA and China are locked in a trade war that began in 2018 under President Trump and has continued under President Biden.

US tariffs on Chinese goods:

• $370 billion of Chinese goods subject to tariffs (25% on most goods)
• Targets: steel, aluminium, electronics, machinery, consumer goods

Chinese tariffs on US goods:

• $185 billion of US goods subject to tariffs (25% on most goods)
• Targets: soybeans, cars, aircraft, semiconductors

Why the trade war?

• US complaints: China steals intellectual property, forces technology transfer, subsidises state-owned enterprises, manipulates its currency, and dumps cheap goods on global markets
• China's response: The USA is trying to contain China's rise and maintain its hegemony

The trade war has cost both countries billions in lost trade and higher prices for consumers.

2. Technology rivalry

The USA and China are competing for dominance in critical technologies:

• Semiconductors — the USA has banned exports of advanced chips to China (used in AI, supercomputers, weapons)
• 5G — the USA has banned Huawei (Chinese telecom giant) from US and allied networks, citing national security
• Artificial intelligence — both countries are racing to develop AI for military and economic advantage
• Quantum computing — both countries are investing billions in quantum research

US actions:

• CHIPS Act (2022) — $52 billion to boost US semiconductor manufacturing
• Export controls — banning exports of advanced chips and chipmaking equipment to China
• TikTok ban — the USA has banned TikTok (Chinese social media app) over data security concerns (though the ban is being challenged in courts)

China's response:

• Made in China 2025 — $300 billion plan to become self-sufficient in semiconductors, AI, and other technologies
• Rare earth export controls — China controls 80% of global rare earth production (used in electronics, batteries, weapons) and has threatened to restrict exports

3. Taiwan

Taiwan is the most dangerous flashpoint in China-US relations.

The background:

• Taiwan is a self-governing democracy of 24 million people, with its own government, military, and currency
• China claims Taiwan as part of China and has never renounced the use of force to "reunify" it
• The USA does not officially recognise Taiwan as independent (to avoid provoking China), but it supports Taiwan with $20 billion in arms sales since 2020 and has implied it would defend Taiwan if China invades

Why Taiwan matters:

• Moral: Taiwan is a democracy, and the USA has a moral interest in defending it
• Strategic: Taiwan controls the Taiwan Strait, a critical shipping route for global trade
• Economic: Taiwan produces 90% of the world's advanced semiconductors (made by TSMC), which are essential for smartphones, computers, cars, and weapons

The risk of war:

• China has increased military pressure on Taiwan, with daily incursions into Taiwan's air defence zone and large-scale military exercises simulating an invasion
• US intelligence estimates China could invade by 2027–2030
• President Xi Jinping has said reunification "cannot be passed down generation after generation," suggesting he wants to resolve the issue during his lifetime

A war over Taiwan would be catastrophic — millions of casualties, global economic collapse, and potential nuclear escalation.

4. South China Sea

China claims 90% of the South China Sea (a critical shipping route for $3 trillion of trade per year) and has built artificial islands with military bases, airstrips, and missile systems.

The USA and its allies (Japan, Australia, Philippines) reject China's claims and conduct freedom of navigation operations (sailing warships through disputed waters) to challenge China.

Tensions are high, with frequent close encounters between US and Chinese warships and aircraft.

5. Human rights

The USA accuses China of human rights abuses:

• Uyghur genocide — China has detained 1+ million Uyghurs (a Muslim minority) in "re-education camps" in Xinjiang, which the USA calls genocide
• Hong Kong crackdown — China has crushed pro-democracy protests in Hong Kong and imposed a national security law that criminalises dissent
• Censorship and surveillance — China has the world's most sophisticated surveillance state, with facial recognition, internet censorship, and social credit systems

China rejects these accusations and accuses the USA of hypocrisy (citing US police violence, mass incarceration, and wars in the Middle East).

The New Cold War

Many analysts describe China-US relations as a new Cold War — a global competition for power, influence, and ideology, short of direct military conflict.

Similarities to the Cold War (USA vs Soviet Union, 1947–1991)

• Ideological rivalry — democracy vs authoritarianism
• Military competition — arms race, proxy conflicts
• Economic competition — trade blocs, technology rivalry
• Global influence — competing for allies and influence in developing countries

Differences

• Economic interdependence — China and the USA are deeply economically intertwined (the USA imports $500 billion of Chinese goods per year), unlike the USA and Soviet Union
• Nuclear weapons — both have nuclear weapons, but China has far fewer (350+ vs USA 5,800)
• Globalisation — the world is more interconnected than during the Cold War, making decoupling difficult

The UK's Position

The UK is caught between the USA (its closest ally) and China (its third-largest trading partner, after the USA and EU).

UK-China trade:

• £110 billion per year (2023)
• UK imports: electronics, machinery, clothing
• UK exports: cars, pharmaceuticals, financial services

UK policy:

• The UK has followed the USA in banning Huawei from 5G networks and restricting Chinese investment in critical infrastructure
• But the UK is more cautious than the USA, seeking to balance economic ties with security concerns
• The UK has called China a "systemic challenge" but not an "enemy"

What Happens Next?

Scenario 1: Managed competition

China and the USA compete but avoid direct conflict. They cooperate on global issues (climate change, pandemics) while competing on trade, technology, and influence. This is the best-case scenario.

Scenario 2: Decoupling

China and the USA decouple economically, creating two rival blocs (US-led West vs China-led East). Global trade and growth suffer, but war is avoided. This is the likely scenario.

Scenario 3: War over Taiwan

China invades Taiwan, the USA intervenes, and the two superpowers go to war. Millions die, the global economy collapses, and nuclear escalation is possible. This is the worst-case scenario (but not impossible).

The Bottom Line