บท 85: Chapter 77 Xu Yan Comprehends the Sword Dao, A Clear Sword Heart_2

```

Similarly completing Skin Refinement, however, the strength of the skin membrane had considerable differences.

"Skin Refinement is also graded, it's not the same for everyone who completes it,"

This was due to the disparity in martial arts talent.

After completing Skin Refinement, Shi'er's strength had increased.

Li Xuan then taught him the Bone Refinement technique.

According to what Xu Yan said, his father had already begun Bone Refinement, and his mother had just completed Skin Refinement, which also showed him the disparity in martial arts talent, and that the results of cultivation would vary.

Pharmacist Pan had also entered the Bone Refinement stage.

As for the rest of his trusted guards, a small part had entered Bone Refinement, and some had completed Skin Refinement.

This was still thanks to Pharmacist Pan, who had concocted nourishing medicinal substances to aid in their cultivation.