高上玉皇胎息經/Gaoshang Yuhuang Taixi Jing -The Most High Jade Emperor’s Embryonic Breathing Classic
Jade Emperor Tianzun said:
The embryo comes from the Qi hidden away while breathing, Qi comes from having the embryo while breathing.
Qi entering the body & arriving is called birth, Shen going & leaving the body is called death.
Knowing Shen & Qi, long life is possible.
Therefore, guard nothingness in order to cultivate Shen & Qi.
When the Shen moves then the Qi circulates, where the Shen stops then the Qi dwells.
If you desire a long life, mutually focus the Shen & Qi.
心不動念, 無來無去, 不出不入, 自然常在。
When the Xin isn’t moved by thoughts, lacking coming & lacking going, without exiting & without entering, it will, naturally, always stay.
Constantly practicing it is the true path of the Dao.