Is it possible for someone to install red-flag Linux on a mobile hard disk?

Is it possible for someone to install red-flag Linux on a mobile hard disk? -- Linux general technology-Linux technology and application information. For details, refer to the following section. I started to learn how to use LINUX and didn't want to affect the system on my laptop. So I planned to install LINUX on a mobile hard disk. After downloading the ISO file of Hongqi LINUX7.0, neither of the two methods is successful. The main problems are the following:
Method 1: first create a USB flash drive installation program, then plug in the USB flash drive and mobile hard drive, and set the USB flash drive to start in BIOS. After the Linux LiveCD system is installed, select a mobile hard disk for installation. After the installation is complete, restart, unplug the USB flash drive, set the computer to start with the mobile hard disk, go to the GURB menu, select LINUX, and prompt for an error. Press any key to return to the GRUB menu.
Method 2: Install vmwarevm in WINDOWS and create a new LINUX virtual machine. The hard disk is directly mapped to the physical mobile hard disk, and then the ISO of LINUX7.0 is loaded and started from the CD. Install the LiveCD system. After the installation is complete, restart and set the computer to start with a mobile hard disk. Normally, go to the GURB menu and select LINUX. the startup screen of red-flag LINUX appears, but an error is prompted immediately.
The expert knows how to solve the problem.