Zuo Pan Bu (interpreted as “sitting on crossed legs stance”) is known by a number of names, such as the contemporary wushu “cross stance” or “rest stance.” It can be assumed by beginning in Ma Bu, pivoting counterclockwise on the right toe, and crouching down with the back straight. The result is a cross-legged stance that can be used for initiating attacks or defending, while facing the opponent with one’s side. The crossed legs protect the groin from attacks and prepare the practitioner for a side kick.
More importantly, Zuo Pan Bu is the basis for Xie Bu (蟹步 literally “crab walking”), which is also called “clandestine steps.” Crab walking is performing by alternating assuming Zuo Pan Bu and Ma Bu, moving to one side. From Ma Bu, stepping to the side with either leg effects a transition to Zuo Pan Bu. Using the other leg, the next step to the side returns the practitioner to Ma Bu and the process iterates. The overall effect is rapid movement to one side. Nearly all combat applications of Zuo Pan Bu involve Xie Bu to some degree.