How to untie after self-binding?

Kneeling on the board, first put the two wrists and ankles on the ankles, clamp the cable of the cable switch of the electric releaser and the tightening rope of the tightening ring on the left and right toes respectively, pull down the drawstring sleeve of the tightening ring and tie it into a rope loop to wrap the two wrists and ankles together. Then put your hands behind your back, put your left hand into the wrist-ankle cuff on your left ankle, and put your right hand into the wrist-ankle cuff on your right ankle (backward, that is, your hand extends in the ankle direction to the calf direction).