The Hangzhou prefectural yamen lay within Qiantang County's jurisdiction. The prefectural runners hurried to the Qiantang yamen, where they spotted the deputy squad leader and asked, "Is Constable Li Gongfu here?"
"It's Chief Sun. Constable Li was busy all night and went home to sleep. Is something the matter?" the deputy squad leader asked.
"The Chief Constable needs to see Constable Li. Take me to his home."
The deputy squad leader did not dare delay and immediately led the men to Li Gongfu's house.
Li Gongfu was still sleeping soundly. When he was awakened and saw the visitor, he was somewhat surprised. "Sun Nong, why are you here?"
"The Chief Constable wants to see you."
"The Chief Constable wants me? Oh, all right." Li Gongfu hurriedly dressed, picked up his saber, and followed Sun Nong to the prefectural yamen, where he met Chief Constable Yang Yue.
"Greetings, Chief Constable. What did you wish to see me about?" Li Gongfu asked respectfully.
"Tell me every detail of what happened last night. Do not leave out a single thing," Yang Yue said gravely.
Li Gongfu did not dare conceal anything. He began with the Cui Family's report, described the inspection of the scene, and finally said, "I was standing on the roof, preparing to examine the traces again, when a paper crane made of yellow paper suddenly flew over. It actually spoke while hovering in the air."
Yang Yue had listened intently throughout. When Li Gongfu finally reached the part that concerned him most, he said, "Explain this part in greater detail. Do not miss a single word."
"Yes."
"The paper crane stopped in midair and said, 'Is this Constable Li Gongfu?'"
"I said yes."
"The paper crane said, 'There is no need to be nervous. This is a voice-transmitting paper crane.