Kodoninja

My Taiji shifu who is from a Wu Tu Nan Wu lineage said that the Dantian is just the center of gravity. So if we’re talking about Taiji, a person with a Dantian is someone who is always rooted and has the ground. From doing Wuji standing for long periods, an opposing force starts to life up your body. Then yang qi from above starts to properly move and align down into the body and mixes with the yin qi. Then if you’re speaking about Neidan, a Dantian is when someone who has the elixir (golden pill or embryo) in their lower reservoir. This implies that the practitioner is at the stage of Di Xian or close to it. So an actual Dantian is not exceptionally rare and doubt anyone here has one. I certainly don’t have one(if we’re talking about the pre-Heaven).