Kill a Thousand Calamities with One Sword

Humans have three orifices, the Dantian contains the sea of ​​Qi, the heart orifice contains the sea of ​​blood, and the Niwan Palace contains the sea of ​​spirit. There are three difficulties in attaining the Tao: the sea of ​​qi builds the foundation of the Tao, the sea of ​​blood condenses the golden elixir, and the sea of ​​gods turns into the Nascent Soul. If the three orifices are opened together, you can connect to the heaven and the earth, and become an immortal in one step...