2. Semiconductor manufacturing is the most complex industrial process in the world. You need billions of capex and decades of experience. Even existing semi players like intel cannot switch production to memory.
China CXMT is gaing traction in DDR market. New fabs from all players wil come online in the next two years.
I guess they would love to produce it themselves, but for the average scenario the production reserves they have with Samsung already work well enough and prevent them from having to get into such a complicated industry.