Chinese esoteric Buddhist exercise was dependant on deity yoga plus the "a few mysteries": mantra, mudra and mandala. These 3 mysteries enable the Buddhist yogi to faucet into the human body, speech and intellect on the Buddhas.[100] Out with the sacred Hindu mantras dedicated to Lord Shiva, "Om Namah Shivaya" https://www.youtube.com/@Mahavidyabaglamukhi/