Hard to say what will happen. The scenario is unpredictable.
I suspect Huawei can negotiate a deal where it will be allowed to operate if it buys Intel chips for everything 5g. Basically, abandon Huawei chip design teams.
Looking at China's 2017 imports from the US:
View attachment 60095
There isn't much that China buys from US that can be blocked. It also makes no sense to block exports to the US.
Chinese people spend their money wisely.
The US is doing second/third order bannings of exports. For example Huawei buys chips from TSMC, that is not a purchase from America, but because US says TSMC uses American gear, then Huawei is banned from TSMC...
This will be applied to everything that China needs that is critical that can hurt China if denied as well, not just about Huawei and not just limited to semiconductor industries. Mark my words.