After SUSE 16.0 is installed, the system enters the terminal instead of the desktop environment. At the same time, many software programs are not installed, such as yast and tigervnc.
@mengxin523 Hi and welcome to the Forum 
Can you post the output from cat /etc/os-release
Many changes, no YaST anymore, use Cockpit, there is no desktop in SLES?
@mengxin523 So it’s still Beta 4. Did you subscribe to the Beta? https://www.suse.com/betaprogram/sles16-beta/