Hmm. They don't seem to be quite there yet technology wise. They are still using Western designed and built IEPS systems for their CMSA ships. This one was commisioned last year, and can run on batteries which might imply that it is a MVDC architecture:No, it can not be DC vs. AC, China never went the AC path.
This screenshot from the ABB PEMS system confirms that the architecture is MVDC: