Install Xfce desktop environment with this.

Install XRDP.

$ sudo yum install -y epel-release
$ sudo yum install -y xrdp
$ sudo systemctl enable xrdp
$ sudo systemctl start xrdp

Open XRDP port.

$ sudo firewall-cmd --add-port=3389/tcp --permanent
$ sudo firewall-cmd --reload

Create .Xclients in home directory of user to be connected.

$ echo "xfce4-session" > ~/.Xclients
$ chmod a+x ~/.Xclients

The rdesktop connection is as the following.

install xfce4