Heavenly River Sword Technique

There are only nine moves in the rudimentary edition. However, you can deduce it continuously.

The Heavenly River Swordsmanship was majestic, but they are exquisite and oppressive.

It was as if not facing the river but the vast ocean.

What is the Heavenly River ?

The milky way hanging above the sky is the Heavenly River.

The Heavenly River is the milky way.

No ocean could compare to the size of the milky way.