Here's a thought.
a) the US cuts off Huawei
b) Huawei is better / faster at producing 5G products when compared to the foreign competition (Nokia, Ericsson, etc)
c) Chinese carriers can deploy 5G products faster than the USA
That means China will likely be first in deploying and using cheap 5G networks, compared with the USA
So Chinese companies will be first to build new commercial business models, and will be doing this in the world's largest telecoms, automobile and retail market.
Think self-driving cars, VR, AR, telemedicine, Internet of things, retail etc
Then these Chinese companies will look to expand in the rest of the world. But their competitors in US will be less developed and smaller than the Chinese companies.
So whilst Huawei loses out on the initial equipment supply, it means other Chinese companies will have a competitive advantage in the industries actually using 5G.
And the value of these downstream industries is way greater than the value of Huawei supplying the 5G infrastructure.
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So in summary, the US Huawei 5G network bans means:
a) a more secure network for them
b) it will cost more
c) it will be slower to build
d) Chinese companies have a competitive advantage in technology, scale and business models using 5G. That means they can expand to the rest of the world first (including the US)
So from the Chinese perspective, should China really complain about the USA shooting itself in the foot by banning Huawei?
The same logic applies to any rich hi-tech country than wants to ban Huawei. Think Japan, Korea, Australia. But not New Zealand which doesn't have a tech industry