Before revision: 159) ( ( , Microcosmic orbit) Concurrent with historical developments of Daoism, the technique of "Returning the essence to replenish the brain" evolved from sexual yoga to cosmic meditation.
After revision: 159) ( , Microcosmic orbit) Concurrent with historical developments of Daoism, the technique of "Returning the essence to replenish the brain" evolved from sexual yoga to cosmic meditation.