Zhang Yu glanced at Daoist Puyi and said blandly, "You do not seem to be the master here, sir."
Daoist Puyi snorted. "Senior Brother Xue is my senior brother. I can make decisions in his affairs as well."
Zhang Yu said, "Yet when I exchanged letters with Fellow Daoist Xue, he never mentioned you in the slightest."
Upon hearing this, Daoist Puyi was immediately left speechless. Just as he was about to say something more, a voice came from deep within the cave abode. "Junior Brother Puyi, has a guest arrived outside?"
The moment Daoist Puyi heard this, he knew his senior brother did not want him to say more. He angrily flicked his sleeve and turned to leave.
After a short while, an old Daoist in coarse hemp robes emerged from within. Though white-haired, he was vigorous and bright-eyed. Seeing Zhang Yu, he clasped his hands in greeting and said apologetically, "Would this be Inspector Zhang? Forgive me for failing to welcome you. This old Daoist was just studying a formation. Once I began pondering it, I forgot all matters beyond myself. How discourteous of me."
Zhang Yu said, "Fellow Daoist Xue is too courteous."
Daoist Xue said, "Inspector, please come inside and take a seat." With that, he invited Zhang Yu into the inner hall of the cave abode.
When Zhang Yu entered, he saw a miniature Nether City floating in the center of the cavern hall, with luminous mist constantly flickering around it. Many neat jade counters had been arranged all about. He said, "Could Fellow Daoist Xue be deducing the formation of Nether City?"
"Indeed. This formation differs greatly from those established in Sky City." Daoist Xue seemed to recall something just then and slapped his white-haired head. "I nearly forgot. It was Inspector Zhang who