Dantian, dan t'ian, dan tien or tan t'ien is loosely translated as "elixir field", "sea of qi", or simply "energy center". Dantians are important focal points for meditative and exercise techniques such as qigong, martial arts such as t'ai chi ch'uan, and in traditional Chinese medicine.
Taoist and Buddhist teachers often instruct their students to centre the mind in the navel or lower dantian. This is believed to aid control of thoughts and emotions. Acting from the dantian is considered to be related to higher states of awareness or samadhi.
The Taoist concept of dantians as energy centers is similar to the Indian yoga concept of chakras as key points where prana is stored (see also nadis). The major difference, however, is that Taoist dantians are the major energetic storage mechanisms whereas the yogic chakras are not so much storage centers, but energetic vortices which act as intake and output ports. Many traditions consider the dantians and the chakras to be separate, albeit cooperative energetic mechanisms.
Different schools of thought categorize dantians in various manners. Three main dantians are typically emphasized:
Lower dantian (下丹田, Xià Dāntián): below the navel (about three finger widths below and two finger widths behind the navel), which is also called "the golden stove" (金炉 pinyin: Jīn lú) or the namesake "cinnabar field" proper, where the process of developing the elixir by refining and purifying essence (jing) into vitality (qi) begins.
Middle dantian (中丹田, Zhōng Dāntián): at the level of the heart, which is also called "the crimson palace", associated with storing Spirit (Shen) and with respiration and health of the internal organs, in particular the thymus gland. This cauldron is where vitality or Qi is refined into Shen or spirit;
Upper dantian (上丹田, Shàng Dāntián): at the forehead between the eyebrows or third eye, which is also called "the muddy pellet", associated with the pineal gland. This cauldron is where Shen or spirit is refined into Wu Wei or emptiness.
Importance of the lower dantian:
The term dantian used by itself usually refers to the lower dantian, which is considered to be the foundation of rooted standing, breathing, and body awareness in qigong and martial arts. The lower dantian has been described to be "like the root of the tree of life".
In speaking of the lower of the three energy centers, the term dantian is often used interchangeably with the Japanese word hara (腹; Chinese: fù) which means simply "belly". In Chinese, Korean, and Japanese traditions, it is considered the physical center of gravity of the human body and is the seat of one's internal energy (qi). A master of calligraphy, swordsmanship, tea ceremony, martial arts, among other arts, is held in the Japanese tradition to be "acting from the hara".
The lower dantian corresponds to the yoga concept of the swadhisthana chakra. In yoga philosophy, it is thought to be the seat of prana that radiates outwards to the entire body.