The term "Qi Sinking to the Dantian" (气沉丹田) is mentioned in various fields in the Chinese language, in martial arts and internal practices, in sports, arts, theatre performances, singing techniques and many more.
"Qi" commonly refers to the breath; but it also includes innate energy, the subtle essence within the organs; the body’s sensations; a person’s emotional states; and much more.
To achieve this in taijiquan practice it may be helpful to use the term "Focus on the Dantian". “Qi sinking to the Dantian” is the result of performing actions such as "relaxing the chest and rounding the back", "sinking the shoulders and dropping the elbows" etc. These actions create a sensation of "loosened, grounded strength" in the lower body. We’re using this "loosened, grounded strength" to cultivate a sense of "Qi." The "Qi sensation" helps direct our centre of gravity toward the lower abdomen around the Dantian area, guiding it downward smoothly and eventually achieving an ideal framework of lightness above and solidity below.
The process is also helped by abdominal breathing. It involves the diaphragm constantly contracting and relaxing, pressing on the abdominal cavity, which produces a feeling of heaviness, fullness and strength in the Dantian area.
"Focus on the Dantian" and "Sinking Qi to the Dantian" are about creating a certain sensation. Ultimately, it’s more about the use of "intention" rather than the use of Qi or force to achieve this.
