yes
Recently, some media broke the news that Huawei's 28 nm chip has begun mass production, using DUV lithography machine, if Huawei can achieve 28 nm chip mass production, has been able to meet most of the domestic demand.
Although the 28nm chip, and the current existing 5nm, 7nm or 14nm, there is a big difference, which is absolutely good news for the domestic semiconductor industry, because as long as Huawei's officially announced technology, it must be completely autonomous, but the final whistleblower said that it is expected to 2023 to achieve a new breakthrough.
Yes, 28nm chips have already been mass-produced in China. In June 2020, Lenovo officially released the T-series processor and began mass production of the 28-nanometer process processor, providing a new choice for the domestic desktop computer market. In addition, Lenovo released the seventh generation ThinkCentre desktop series computer built around the T-series processor and went on sale.