I have just started studing kyushu points, particularly in relation to kata. Some of my students are training with me and one of them has been doing tai chi for years. He does tai chi exercises before he trains to open up his body and increase his energy flow. Most of the kyushu applications have no effect on him.
Those of you that are knowledgable about kyushu; given that striking Kyushu points interupt the energy flow through the body, do you think that the tai chi exercises are protecting him against them?