Different from ordinary people, practitioners could practice skills to use the True Qi of the body as a guide, and control this innate True Qi to absorb the energy of the outside world continuously, so that the True Qi could continue to thrive.
Until they cultivated to a certain level, the True Qi in the meridian was saturated and could not accommodate more True Qi, and it would need a larger container for the True Qi, and this container was the Dantian.
If the Dantian was developed, the True Qi would have enough space. It would continue to expand the volume of True Qi again, until the amount of True Qi contained in Dantian was saturated, then it would find another container.
Ding Ning guessed that this container was the middle Dantian, but as a person who had not developed his Danti
