High CPU usage when running CentOS in VirtualBox

Statement: the following method is not original, but a solution found on the official VirtualBox forum.

I don't know why, when running CentOS in VirtualBox, VirtualBox will always fill up a CPU core. So every time CentOS is run, the CPU fan is always screaming and annoying.

Google once, some people have raised this issue in the official VirtualBox forum and have a solution. Although the following solutions seem inexplicable, I personally tested the results: they are indeed valid.

Solution: run a virtual machine with VirtualBox.

Of course, the configuration of the second running Virtual Machine is not too good, for example, I set it according to the minimum value that can be set.