Also known as Wu Song Tie Kou, it is one of the Jingwu Shaolin boxing types. Its method is unique. The first half of the routine imitates Wu Song being locked, i.e. the hands cannot move, and thus use footwork to deal with the enemy.  The second half of the routine has the hands being released, the hands and feet are used together.  So the whole routine has lots of ups and downs body movement. Fighting techniques are also all round.  There are body ground rolling movements, lying on the ground using the legs to toppling the enemy. Kicking actions are also demanding including  consecutive kicks, whirlwind turn and other movements. It is a relatively profound complicated routine .