Chi is believed to be the vital force forming any living entity and it is the central underlying principle of TCM. It is the energy that your organs use to repair and heal. TCM works with the 24-hour flow of chi through your body. Every 24 hours chi spends two hours in each of the twelve organs.
Many people focus on a single chakra - like the Crown Chakra for Spirituality, the Brow Chakra for Psychic Powers, the Heart Chakra for Universal Love, the Solar Plexus for Power (especially for those into the martial arts) and so on - each chakra's special attribute. And some people try to repress the 'lower' chakras as morally bad.