you have an off-brand chinese tablet. the bootloader usually is up to the manufacturer to make it unlockable or not. usually its as simple as enabling oem unlock in developers mode.
but with a no-name chinese tablets who knows what they do to the bootloader.
also why do you want to root this? there is no development community supporting it. there is no custom recovery...which is a very important tool for root users.
just remember no devs=no fun