Competition between Beijing and Washington for supremacy in advanced technology is now in full swing. On September 27, Ren Zhengfei, the chief executive of Chinese networking equipment giant Huawei, claimed the company had begun producing its first 5G mobile network base stations without US parts. This was the inevitable result of the Trump administration’s decision in May to restrict access for China’s most important global technology company to US hardware and software on national security grounds. It marks an important milestone - and a key test - in what is the growing US-China Technology Cold War.While it is not yet clear whether Huawei can remain globally competitive in either network equipment or mobile handsets without easy access to US innovation, particularly the technologies and software required to stay at the cutting edge in semiconductors and mobile operating systems, Huawei seems determined to make a go of it. Even if the company manages to get some relief from the Trump administration as part of an eventual settlement in the US-China trade fight, powerful political forces are likely to drive more US and Chinese technology firms to design their products in ways that avoid each other’s technology.Washington is deeply concerned about risks to national and economic security stemming from China’s technology rise. The administration of US President Donald Trump remains determined in its campaign to decouple the US and Chinese technology sectors and to drive sensitive technology supply chains out of China. Beijing will continue to respond to US pressure by pushing for self-sufficiency in advanced technologies.It’s this new tech cold war, more than the trade logjam that’s currently dominating headlines, that will threaten global prosperity and stability for decades to come. While there’s still time, a coalition of committed nations and companies should establish a new forum to manage this new, 21st century geopolitical competition.