When practicing these basic skills, you always spread a blanket on the floor, practice on the blanket and turn on the blanket, so it is called "blanket work".
Because if you fall and touch it, there will always be a blanket. It won't fall too hard and you can't touch it.
There are many styles of somersaults, most of which are supported on the ground with both hands, or jumping on the ground with both feet, tumbling forward, backward and left and right, commonly known as "all-round somersault".