see #1. China doesn't really have their supply-chain of their own. SMIC's 7nm in particular runs on ASML DUV's. China's most advanced litho maker is SMEE. I

see #1. China doesn't really have their supply-chain of their own. SMIC's 7nm in particular runs on ASML DUV's. China's most advanced litho maker is SMEE. It was reported that their most cutting-edge node 28nm would be mass-produced this year, but don't hold your breath -- they've been saying it for at least a couple of years now.