In a low voice, Lin Yun pushed open the small wooden house and came to an empty space in front of it.,The ten levels of martial arts, the first three cultivate skin, bones, and meridians. The middle three cultivate flesh, blood, and five internal organs. The last three connect tendons, transform bone, and change marrow, reaching the peak of the tenth level.,Lin Yun felt a bit annoyed in his heart. As a nobody, being in this heavily hierarchical sect, delaying matters for those bigwigs would have dire consequences.。