Has/Can the Chinese state not establish pilot facilities to test and demonstrate their effectiveness at the cost to the state, given that there is so an urgency to replace foreign lithographic machines and a very realistic probability that even present ArF machines of any foreign country at any nodes will in the near term future be banned from being sold to China? The United States could successively persuade the Dutch and Japanese governments to ban ASML, Nikon, Canon, or any others that exist in the field from selling ANY DUV machines to China.
The Chinese state has so often declared the need for comprehensive technological self reliance. Chinese companies that use advanced technologies will very likely be much more willing to comply with such a proclamation if the development and demonstration of the effective of the domestically made technologies is done at no cost to them.
If you want me to use a particular type of knife and scissors instead of others that I currently use, if you demonstrate that the knife and scissors that you want me to make is as good as they ones that you do not want me to use, and will at least be just as costly, I will most likely buy them, especially if the ones that supply me with the knife and scissors that I like and want to buy either stop supplying me or keep saying that they will stop supplying me.
Let the Chinese government build a comprehensive pilot plant to demonstrate the effectiveness of SMEE's lithography machines and if they prove good enough, SMIC, Yangtze, and others will probably buy them...