User blog comment:CNBA3/Naruto Gaiden Arc Idea!/@comment-25771248-20150525160620/@comment-5303512-20150525163819

Well, that would have been the case, but since drawing in Chi (live force) has been a part of these people of Tianxia for who knows how long, it's like a biological thing that they draw in Chi without, unlike people of the Shinobi who are biologically able to produce Chakra inside themselves.

The people of Tianxia have been separate from the people of the Shinobi from the beginning and thus they have adapted different styles of getting live force energy.

The art of gathering Chi and practicing Feng Shui was founded by Shen Tianxia thousands of years ago, legend has it that a star fell out of the sky and the people find inside was a baby, they raised the child, as the child grew, he could perform miracles such as gave life to crops, produce rain, and controlled the seasons, and at a young age he was already nigh-omniscient. The people worshipped the child as a God and made him the Emperor of the lands, they said that he was destined to rule the world. They have him the name Tianxia (Under Heaven) he then named himself Shen (Spirit or Divine), when he was a adult, he led an invasion of the land of Shinobi when Hagoromo was still alive, Shen challenged him and lost, after thousands of years (today in Naruto Gaiden time) he returns to finish the job and steal all the souls of every living creature.