China is broadening its export control measures, extending restrictions beyond rare earth minerals to other critical supply chain sectors that underpin key U.S. industries, according to investors, business executives, and supply chain experts. This expansion reflects Beijing's growing use of trade controls as leverage in geopolitical and commercial disputes, particularly with the United States and its allies.

Following a series of tariffs imposed by the Trump administration, China implemented significant export curbs on rare earth minerals—essential components in numerous technology products and largely produced within China. During President Donald Trump’s recent visit to Beijing, Chinese officials reportedly agreed to address U.S. concerns about these restrictions. However, analysts note that rather than easing controls, China has quietly widened its scope to include other materials and technologies, including silicon wafers, permanent magnets, LEDs, and battery materials, creating multiple chokepoints in global supply chains.

“Their intention is to weaponize other supply chains beyond just rare earths,” said Liza Tobin, former China director at the National Security Council. This strategy appears designed not only as a defensive mechanism against U.S. containment efforts but also as a proactive means of maintaining economic leverage, according to policy analysts.

Companies have already felt the impact. A recent survey by the U.S.-China Business Council found that over a third of its members reported disruptions linked to Chinese export controls in the past year, with sectors such as automotive and logistics particularly affected. The Rhodium Group highlighted that Beijing’s influence now reaches intermediate manufacturing sectors—areas that create additional leverage points.

One notable example involves U.S. efforts to rebuild solar panel manufacturing capacity amid rising energy demands driven by artificial intelligence and other technologies. China dominates global solar production, accounting for more than 90 percent of solar cells and wafers in recent years. American firms seeking to procure manufacturing equipment face obstacles; talks initiated by Elon Musk’s companies, Tesla and SpaceX, to buy solar cell production machinery from Suzhou Maxwell, a leading Chinese manufacturer, were reportedly halted in March following a directive from Chinese authorities. This intervention, though informal and lacking official documentation, effectively paused negotiations and illustrates Beijing’s willingness to restrict technology exports on strategic grounds.

Suzhou Maxwell, listed on the Shenzhen stock exchange and with subsidiaries abroad, has steadily increased international sales but is now cautious about shipping equipment to U.S. firms, reflecting broader government policy shifts. The Chinese government has justified these controls as protective measures against what it describes as U.S. containment and suppression attempts.

Experts differ on the underlying motives. Some view the export restrictions as defensive reactions to external pressures, while others argue China is actively leveraging its supply chain dominance to influence global corporate and political behavior. “There’s a logic to these export controls and it’s not purely retaliatory,” said Camille Boullenois of the Rhodium Group.

The restrictions could have unintended consequences, as they may accelerate efforts by the U.S. and its allies to develop alternative supply chains independent of China’s control. While China’s current dominance is vast, observers note that rival producers could close the technological gap in several years.

Efforts to reduce dependence on Chinese manufacturing are already underway. Companies like South Korea’s Hanwha Qcells have emphasized the creation of “non-China” supply chains for solar components. However, escalating U.S. import duties on solar products, scheduled for later this year, may further complicate transpacific trade and increase costs for American companies.

As China continues to expand its export controls, and the U.S. responds with its own trade restrictions, the closely intertwined economic relationship between the two countries faces mounting challenges, with significant implications for global supply chains and technological development.