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: , a energy cultivation technique involving circulation159) (, 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.