The dual root partitions we described in Deepin 20.5 are gone, but version 23 still sets up a moderately complex partitioning scheme, including an EFI system partition, a 1.5 GB /boot partition, a swap partition, and a 15 GB root partition, and the rest of the disk given to a partition labeled _dde_data. All are in plain old ext4 format, but there’s some magic being done with the data partition that we didn’t have time to trace. It appears to be mounted at multiple places, including /home, /var, /opt, and a mount point called /persistent beneath them all. We’re not sure exactly how it’s been done, but the distro has some kind of atomic installation facility with rollback.

Lack of proper documentation by Deepins Devs is enough of a red flag for me to never consider trying it.