1, the correct back scraping direction should be from top to bottom, first left and then right.

2. When scraping, generally speaking, the neck is scraped first, then the back is scraped, then the chest is scraped, and finally the limbs are scraped. This is the general principle, and the basic scraping direction is based on the principle that meridian yin rises and yang falls. So the correct direction of back scraping should be from top to bottom, first left and then right.