About the 1nm technology, Zhang Menglong wasn't purely using it to irritate those chip suppliers; within three months, he indeed had the capability to industrialize it.
However, if this industrialization were to scale up, it would still require the synchronized progress of many auxiliary technologies. Given the current pace of technological development, only a small portion of mass production could be completed after three months.
Of course, although this mass production wouldn't be sufficient for market proliferation, it was more than enough for the country to use for research and development.
Pity those guys who kneeled under the scorching sun for half a day and spent a great deal of money, only to obtain a batch of chips that might be obsolete in a few months; they probably would be devastated once they got back.