ChiDragon

The former is incorrect, the "received copy" is not a translation. It is only a codex. I won't argue the latter, but where is this same old standard translation?

乾: 元亨利貞 乾 is the first hexagram of the 64 hexagrams in the Yinjing. 元亨利貞 describes the positive characteristics of the 乾 hexagram. 1. 元 describes that 乾 is the origin of all things. It is the creator of all things. It is the nature of the universe. 2. 亨 describes that everything with 乾 is going smoothly with nature. 3. 利 describes that everything with 乾 is beneficial without interruption, deterrence, or damage. 4. 貞 describes that everything with 乾 is genuine.

There are many translations of the DDJ, but none of them is standard!

MCO stands for Microcosmic orbit(小周天) and Macrocosmic orbit(大周天). If it is not a breathing exercise, then, there would be no such thing as MCO. It would be a myth to think that moving substances through the Du and the Ren meridians. However, the old concept of MCO was only a legendary concept was passed down from century to century. The same old story was always repeated with no proof. There are no living reference. It was only told by the word of mouth. The story comes out differently each time depends on who told it. I had challenged these ideas about MCO on a Chinese Qigong site. So far, no one has taken the challenge with contradiction but just took it silently. I will go find my post and place it here with translation.

Sorry, I don't know him. My understanding was acquired from the correlation between Taoist texts and modern science. Sometimes, the ancient Taoist text does not make much sense. Thus I have to find my answer elsewhere to put things into perspective.

Yes, it is true.

元炁 should not be translated as Original Breath. It is a substance was untouched by fire.