Zhou Heng once sent a strand of his divine soul thought to that world, which was based on the divine soul visualization technique. After returning, he not only brought back virtue but also the techniques he learned in that world.
Although most of the techniques were incompatible with the rules of Da Qi and therefore unusable, the Ghost Puppet Technique, the Great Mighty Heavenly Dragon Bodhisattva Visualization Technique, and those he adapted for martial arts could be used.
Moreover, since the strand of divine soul thought that descended into that world had become extremely powerful by the time it returned, its fusion with his main body almost instantly brought his divine soul power to the brink of the Sect Fifth Rank.
With such divine soul power, even if Shan Hui was a secretive martial artist at the pinnacle of the Secret Six Rank, he could not escape the fate of being refined into a puppet by Zhou Heng.