Both self-cultivation yoga and Tai Chi are acceptable, but Tai Chi is certainly better for fitness. Tai Chi, well practiced, has powerful offensive and defensive functions, which is also based on a strong body and is incomparable to yoga. Now, most of the Tai Ji Chuan that we saw the old ladies practicing in the park has actually become Tai Ji Chuan's practice. Tai Ji Chuan, the real traditional kung fu, is still very interested. But now in the era of hot weapons, few people practice that, but fitness is still very useful. In addition, any exercise, if the action is not standardized, may cause harm to the body. This requires us to avoid it in the process of exercise.