The most correct! What is the most traditional closed valley health?

According to the "hold Park Zi internal chapter - miscellaneous should be" chapter, that is to say, there are food twelve hours gas method, food star gas method, food six E essence gas method, think of God food gas method, and so on. Simply put is the Taoist spit breath practice, this thing in ancient times will really not many people, coupled with a long time caused by the loss of tradition and myths. Specifically how to get, I guess now there are not many people are aware of. Suggest that the owner or to do a mortal it, no cultivation of the arts can not repair the immortal, huh