When Huawei debuted its Mate 60 smartphone in mid-2023, it turned heads around the world after teardown artists found it contained a system-on-chip manufactured by Chinese chipmaker Semiconductor Manufacturing International Corporation (SMIC) using a 7nm process. SMIC was thought not to be able to build that sort of thing. So while the Mate 60 didn't differ markedly from every other modern smartphone, its very existence called into question the effectiveness of US-led efforts to prevent advanced...