A Ghost Knocks at Midnight, but You Knock on This Daoist Master's Door?

Zhang Wuchen transmigrates into a supernatural world. Just after his cheap master dies, and as he awakens the Celestial Master's Great Way System, a sudden, urgent knocking sounds at the door! But there's no living creature anywhere nearby. He senses the presence and confirms it: a ghost is knocking! Zhang Wuchen: “Well, well, well. A ghost knocking at my door in the middle of the night? You dare knock on this Daoist master's door?” After the Knocking Ghost, a terrifying tale of a demonic Celestial Master begins circulating in the ghost world! Wronged Ghost: “This really happened! That night, the demonic Celestial Master chased me for three whole blocks. I didn't dare even look back, afraid I'd see my great-grandma waiting for me!” Kidney-Cutting Ghost: “I've been cutting out kidneys for thirty years, only to get mine cut out in the end! That demonic Celestial Master's technique is even more professional than mine! It felt like my insides had been hollowed out!” Graveyard Ghost: “Oh, crap, he's in my territory? Damn it! I'll sleep for two hundred years before dealing with this!” Just as the Graveyard Ghost is about to close the coffin lid, he sees a young man in a Daoist robe raise a lightning-charged palm. Smiling, the man looks at him and says, “It's great being young. You can fall asleep as soon as you lie down.”