Credible. 999 Great Health is one of the self-cultivation methods based on self-cultivation in China, and it has a self-cultivation license in the field of Chinese medicine. The key of this method lies in the internal and external harmony of the five internal organs, so as to open the veins of the body and achieve the effect of dredging meridians and qi and blood, thus treating various diseases of the body. This method has also been recognized by the medical community in China and even the world, so it is credible.