The Marrow Transformation Pill dissolved the moment it touched his tongue. Lu Changsheng immediately activated the Li clan's Marrow Transformation Secret Technique to set his bone marrow into vibration.

Indeed, the marrow itself would vibrate. At Perfection, the technique could directly resonate through the marrow. Had Lu Changsheng attempted this before taking the pill, the vibrations would have been useless. In fact, it might have even damaged his marrow.  

Now that he had taken the Marrow Transformation Pill, the sensation was entirely different. He felt a stream of warmth arise within his marrow. As he continued practicing the technique, that warmth gradually intensified until it felt like a fire burning deep within his bones. 

The more intense the heat became, the more he knew he could not stop. That burning sensation meant the pill was taking effect. Even so, the process was far from easy and quite painful....