"Six" is a special word in China's diet, which refers to the molded meat pieces or slices, and clear lines can be seen. What can be called "willow" is generally a place with moderate exercise, such as pork tenderloin and sirloin. Too much exercise will thicken muscle fibers, and too little exercise will loosen them.

And just the tenderloin meets this requirement, so it is also called "tenderloin".