Sell ​​Green Cattle at the Beginning, Please Use the Back Door to Practice

[No system] [Non-time travel] [Traditional cultivation of immortality] Before he could see his master, he was already dead. Before he started practicing, he was sent to the back mountain to reflect. He swallowed countless pills and practiced the sect's classics alone, … He single-handedly singled out the four major sects. He broke through the gate of heaven without entering, survived the thunder tribulation without ascending, He has enlightened heaven and earth, and has been the only one for eternity. … He remembered what his grandfather said again: "Cheng Yi, don't think blindly. What does sect and cultivation have to do with us..."