[1]openEuler iso contains  Desktop Environment(gnome,kde or others)
    redhat desktop environment is gnome,but centos 8.1 don't contain gnome package
[2]openEuler iso contains Customed Destop Environment(ukui,mate or others)
[3]openEuler iso doesn't contain desktop,Desktop Environment release in EPOL repoŁ¨gnome,kde,ukuiŁ¬mate or othersŁ©

I recommend solution 2