C86 Qi-sinking Dantian

He had also tried circulating his innate vitality (true qi) in an attempt to open up the two meridians through the three trials of the tail, the spine, and the jade pillow, but none of them seemed successful.

According to the book, it was relatively easy to submerge his zhenqi into his dantian along the Ren Meridian, and pass through the Yin and Yang Meridians. However