It enhances China’s confidence in their offensive capabilities---they’ll start a war.
Matthew Kroenig 21. PhD at Berkeley, Professor in the Department of Government and the Edmund A. Walsh School of Foreign Service at Georgetown University, Director of the Global Strategy Initiative and Deputy Director of the Scowcroft Center for Strategy and Security at the Atlantic Council, “Will Emerging Technology Cause Nuclear War? Bringing Geopolitics Back In”, https://www.airuniversity.af.edu/Portals/10/SSQ/documents/Volume-15_Issue-4/D-Kroenig.pdf
Likewise, if China acquired an enhanced ability through new technology to invade and occupy Taiwan or contested islands in the East or South China Seas, Beijing’s leaders might also find this opportunity tempting. If new technology enhances either power’s anti-access, area-denial network, then its leaders may be more confident in their ability to achieve a fait accompli attack against a neighbor and then block a US-led liberation.
These are precisely the types of shifts in the balance of power that can lead to war. As mentioned previously, the predominant scholarly theory on the causes of war—the bargaining model—maintains that imperfect information on the balance of power and the balance of resolve and credible commitment problems result in international conflict.52 New technology can exacerbate these causal mechanisms by increasing uncertainty about, or causing rapid shifts in, the balance of power. Indeed as noted above, new military technology and the development of new operational concepts have shifted the balance of power and resulted in military conflict throughout history.