This is a complex geopolitical question where reasonable analysts disagree significantly. Rather than giving you my own geopolitical judgment (which isn't really something to be resolved by web search), let me lay out the main dimensions of the debate so you can weigh them yourself.
Arguments that China poses a threat:
•Economic/technological competition: Concerns about intellectual property theft, forced technology transfer, industrial policy subsidies, and dominance in critical supply chains (rare earths, semiconductors, batteries).
•Military buildup: Rapid expansion of China's navy, missile forces, and nuclear arsenal; activities in the South China Sea; pressure on Taiwan.
•Taiwan: A potential conflict over Taiwan is widely seen as the most dangerous flashpoint, given US commitments under the Taiwan Relations Act and China's stated goal of eventual "reunification."
•Cybersecurity/espionage: US officials have repeatedly accused China of large-scale cyber espionage against government and corporate targets.
•Alignment with US rivals: China's deepening partnership with Russia, and its relationships with Iran and North Korea, worry those who see an emerging anti-US bloc.
•Global influence operations: Belt and Road Initiative, investments in ports/infrastructure, and diplomatic efforts seen by critics as expanding Chinese leverage at US expense.
Arguments that the "threat" framing is overstated or misguided:
•Deep economic interdependence: The US and China remain massive trading partners and mutual investors; conflict would be extremely costly to both, which some argue creates deterrence rather than danger.
•China's domestic challenges: Slowing growth, demographic decline, real estate crisis, and youth unemployment have led some analysts to argue China is less a rising threat and more a country managing internal weaknesses.
•No direct military conflict: Unlike the Cold War-era USSR, China and the US aren't engaged in proxy wars or direct military confrontation, and both sides have incentives to manage competition rather than escalate it.
•Cooperation needs: Issues like climate change, pandemic preparedness, and global economic stability arguably require US-China cooperation, complicating a purely adversarial framing.
•Threat inflation critique: Some scholars argue that hawkish rhetoric in Washington exaggerates China's intentions and capabilities for political or budgetary reasons (e.g., defense spending justification).
How this plays out in practice:
US policy under both the Biden and Trump administrations has treated China as a "strategic competitor" — imposing tariffs, export controls on advanced chips, and investment restrictions — while still maintaining diplomatic and economic engagement. This reflects a bipartisan consensus that China is a serious long-term challenge, even though there's substantial debate about the right level of alarm versus engagement, and about specific areas (trade vs. military vs. technology vs. ideology).
If you want, I can dig into any specific dimension — military (Taiwan scenario), economic (tariffs/chips), or cyber — in more depth with current reporting.