Upon closer inspection, they realized that Han Yan was using precisely the medical skill of Doctor Sun; presumably, she had picked it up while assisting him earlier.
They guessed correctly; indeed, Han Yan had just learned this technique from Doctor Sun. Being multi-talented was one of the reasons that Sister Mu overcame numerous dangers and repeatedly advanced to the Sword Saint Realm in her past life.
In fact, it wasn't the first time she had secretly learned skills. The Star Illusion Thousand Machine Technique and the Heavenly Star Seal Breaking Technique were acquired from Qu Shanling, so witnessing Doctor Sun's exquisite meridian blocking technique, she naturally learned it.
"Who would've thought, Young Master Mu has such talent, just one observation was enough for him to grasp the essence of my family's inheritance, the Meridian Cutting Hand," Doctor Sun remarked with surprise, deeply familiar with his family's heirloom technique.
