Agreed not helpful to harm a segment of the US population, the rest of the country will cry crocodile tears and spin it as the New Pearl Harbour. Despite the rhetoric right now, the US is still deeply divided on COVID, and as many fingers are pointed towards Trump right now as they are to China, there is no need to fully unite both the left and right under one cause through denial of PPE. Besides, the US is bleeding more than China each day right now (until they get the pandemic under control).
The US announcement said materials in production will get a 120 day grace period to not interrupt business continuity. 120 days is more than enough time for China to craft a proportionate and appropriate response, and I'm sure various scenarios were already being formulated by Huawei in conjunction with the central government. Timing of 120 days takes us to mid-September, which allows any potential response to be taken in the context of the november elections. Also, by mid-august, we will have a very good understanding of any potential 2nd waves within the US and the impact of the pre-mature lifting of lockdown.
Again, I don't think china needs 120 days to respond, but there is enough time for china to evaluate any and all options on the table.
Note that the Global Times article was published a few hours after the US made the announcement.
For this sort of announcement, it means the government source was already pre-authorised to speak to the Global Times about adding US companies to the unreliable entity list. Normally you need rounds of meetings with a lot of different stakeholders, before the Chinese government can agree a policy response.
Given a further Huawei escalation has been expected for months now, I fully expect that Huawei-US actions have already been gamed out, and appropriate responses drawn up.
We saw the same thing with the islands in the South China Seas, with immediate responses to US actions.
As you mention, there is a 120 day grace period. But it takes 90-120days for a chip to be made, so the impact will be almost immediate.
But in the current situation, it is literally impossible to replace China as a production base for semiconductors and every other product.
Nor is there any realistic replacement for Chinese demand and Chinese consumers.
And the gap between Chinese growth and US growth is going to be widen this year, due to COVID-19.
So I expect that there will be huge pressure from Apple, Cisco, Qualcomm, Boeing, Micron, Intel, AMD etc in the coming weeks, and that the Trump Administration will quietly walk this back.
Remember that a few months ago, the government officials most in favour of restrictions on selling US products to China and Huawei were fired by Trump.
So I suspect more US officials will be fired in the aftermath.