Grandmaster Jou was famous for his uncanny youthfulness at an advanced age and after conquering a history of illness.  Here we go over his special daoyin taiji diagram stretch that he only taught in his chan si jin workshop.  This stretch works very fast to increase your leg flexibility and spinal health.  It also has a strange feature in that it stimulates your immune system.  Like a potent medication, if you go about it wrong, it can do more harm than good.  Below, Shifu Loretta Wollering teaches you how to do it the correct way so that you can squeeze out as many benefits from it as easily as possible.  As the video advises, make sure that when you do this in real practice, you go much slower and breathe deeply.  Always check with your physician first if you have any health issues.