The Canopy of Fish Curse

A cursed fish --- Old Sun from the riverside caught a strange blue-and-black fish with a red thread on its back. A wax-sealed drift bottle was cut out of the fish's belly, with a vague imprint of the word "Zhu" printed on the wax. Lao Sun gave the fish to his old friend Song Laoshuan, and five members of the Song family died mysteriously that night. It was initially diagnosed as gas poisoning, but it was actually cyanide poisoning. Lao Sun subsequently disappeared and his body was found at Huishuiwan downstream of the Yangtze River seven days later. There were self-cut marks on his palms. Detective Jiang Che followed the traces and traced: copper coins with Zhu characters, the Zhu house in the west of the city was empty overnight in the 38th year of the Republic of China, the ancient well in the deserted village of Heming Village, the underground stone niche and the secret archives of the Qing Palace Internal Affairs Bureau. Song Ye, the orphan of Song Laoshuan, opened a niche with two copper coins with Zhu inscriptions and got a silk book - it states: Before the last emperor abdicated, something in the palace was secretly moved out of the palace and hidden among the dragon veins and mountains. The Green Lantern Man appeared in the stone chamber and claimed to be the last person Song Changgeng (Song Laoshuan) saw before his death...