丹田是產生丹的地方，所以在ＭＣＯ的狀態下，是沒有丹田的。
丹田就是玄關。
若觀見龍在田，須猛烹而極煉；忽聞虎嘯入窟，可倒轉而逆施。
這句話是呂洞賓的詩
The dantian is the place where the dan is produced, so in the state of MCO, there is no dantian.
Dantian is the entrance.
If you see a dragon in the field, you must cook it fiercely and refine it; if you hear a tiger roaring into the cave, you can reverse it and do it the opposite way.
This sentence is a poem by Lu Dongbin
見龍在田，其中的田，就是丹田
所以呂洞賓說得很清楚，只有田是出現龍的地方。
而龍就是烏肝光。
換句話說，只有出現烏肝光的時候，才有丹田。
在氣感狀態下是沒有丹田的，更沒有聚氣在丹田的說法。
換言之，我非常肯定，丹田是不需要聚氣的。
See the dragon in the field, the field in it is the dantian
So Lu Dongbin made it very clear that only Tian is the place where dragons appear.
And the dragon is black liver light.
In other words, only when there is a black liver light, there is a dantian.
In the state of Qi Sensing, there is no dantian, and there is no such thing as gathering Qi in the dantian.
In other words, I am very sure that the Dantian does not need to gather Qi.
ＭＣＯ屬於氣感的層次，也就是水和火。
因此在水和火的層次，是不需要聚氣的。
需要的是將水和火轉換成金和木。
到了金和木的層次，才會產生丹田。
MCO belongs to the level of Qi sense, that is, water and fire.
Therefore, at the level of water and fire, there is no need to gather Qi.
What is needed is to convert water and fire into gold and wood.
Only at the level of metal and wood can the dantian be produced.
水和火是產生金和木的材料。
金和木才是小藥。
五行俱全之後，才會產生大藥。
Water and fire are the materials that produce gold and wood.
Gold and wood are the small medicine.
After the five elements are complete, the great medicine will be produced.
而木就是我說過無數次的烏肝光，是一種類似地磁北極的光。
And wood is the black liver light that I have mentioned countless times, a light similar to the magnetic North Pole.
所以當一個人把注意力集中在腹部的時候，雖然腹部有非常強烈氣感，但是這並不是丹田。
這只是強烈的氣感，稱為水。
So when a person focuses on the abdomen, although there is a very strong sense of Qi in the abdomen, it is not the dantian.
It's just a strong sense of Ｑi called water.