Yu Zan knew that Pei Yun had asked him what changes had taken place in the situation in Beijing, but because it was inconvenient to say it clearly, he only replied perfunctorily: "If you live in Chang'an for a long time, you will naturally know." He took his leave.

For the next five or six days, although Ming Kerang was deliberately frightened by Yu Zan in the Jin Palace, he did not come to visit, but Pei Yun did not wait for any news from the prince to arrange for him to meet the emperor, because he remembered that he returned to Beijing this time, in addition to Jin to see Sui Gaozu Yang Jian, he was also responsible for the mission to investigate the case in Chang'an, Pei Yun waited for many days without getting a reply, informed Yu Zan, and took the initiative to go to the forbidden army garrison to find Qu Tutong to understand the progress of the investigation of the "Wild Goose's Nest" case in Beijing.

Because Yang Guang surrendered to the imperial court as early as the sixth year of the emperor's reign, and then cracked the case of Nanchen's "Wild Goose's Nest", and captured more than 5,000 members of the "Wild Goose's Nest" sent by Nanchen to lurk in Jiangbei in one fell swoop, Qu Tutong specially ordered Qu Tutong to leave the "Mei's Tomb Dian Xing" and Mr. Mei Er alone, as a bait to trap Xiao Rushui, Zhang Zhongjian and other fish that slipped through the net, so although so many years have passed, Yang Guang himself has already left Chang'an in the south of Suijiangnan, but Qu Tutong has actually been responsible for the mission of checking the remnants of the "Wild Goose's Nest" in Beijing, did not change due to the fall of the Nanchen court and the departure of Yang Guang and others.

Therefore, in order to complete the inventory handed over to him by Yang Guang and find out the envoy Gu Sheng, the main envoy who went to lobby the Turkic rebels, the first thing he thought of was to come to Qu Tutong to inquire and understand the case.

Although Qu Tutong was not very familiar with Pei Yun, after Pei Yun showed him a handwritten letter written by Yang Guang to him, he gave Pei Yun a detailed account of the progress of continuing to investigate the "Wild Goose's Nest" case in Chang'an in recent years.

"Pei Du Ji Room, the last general was ordered by the King of Jin, and the main thing to send people to watch over the years was the 'Mei's Tomb Ceremony' and Mei Er, and the King of Jin determined that the Mei brothers were the first joints of Guan Zizai - Gao Qinglian to convey instructions to his subordinates, as long as they kept an eye on the 'Mei's Tomb Ceremony' and Mei Er, no matter how much time passed, sooner or later there would be unexpected gains. But he didn't expect that until now, Mei Er had not made any abnormal moves under the close monitoring of the last general's subordinates for twelve hours a day, but Gu Sheng, who had never noticed it, had made a mistake here, and the last general felt that he was deeply entrusted by the king of Jin. ”

Hearing that as soon as Qu Tutong opened his mouth, he blamed himself for Gu Sheng's sneaking outside the gate, Pei Yun couldn't help but have a good impression of this forbidden army general, and hurriedly explained to Qu Tutong: "Although the King of Jin had doubts about Gu Sheng's sister Gu Paner's surrender to the imperial court, it has not yet been determined, so it is understandable that the general did not pay more attention to Gu Sheng in Chang'an, and the general does not have to blame himself too much for this." The subordinate was ordered to come to learn from the general about Gu Sheng's stay in Chang'an after Gu Pan'er surrendered to the imperial court until he sneaked outside the border this time, and hoped that the general would inform him in detail, so as to find out the mastermind behind him as soon as possible. ”

"Over the years, I have never found any connection between Gu Sheng and Mei Er." Qu Tutong said in a deep voice, "The last general sent the Turks back to the court by General Changsun, and went to the emperor to persuade the Turks to raise troops outside the Guan, it was not Liu Jushi, the son of Peng Guogong, who committed the offense, but after Gu Sheng, he ordered someone to investigate in detail the situation when Gu Sheng lived in Chang'an since the sixth year of the emperor, and learned that Gu Sheng still stayed in the incense and candle circulation office of Wanshanni Temple in the ancient city of Chang'an after his sister surrendered to the imperial court, and lived on an errand in about the eleventh year of the emperor. The monks in the Daxingshan Temple found that Gu Sheng did not say goodbye, because he was just a handyman, and mistakenly thought that he had gone elsewhere to make a living, so he did not report to the official. That's probably the case. ”

"So, after learning the truth about Gu Sheng's rebellion by pretending to be Liu Jushi, did the general send people to Daxingshan Temple and Wanshanni Temple to find out, who did Gu Sheng have dealings with during his stay in Chang'an?" Pei Yun stared at Qu Tutong and asked.

"The last general has personally gone to Daxingshan Temple and Wanshanni Temple, two places where Gu Sheng makes a living, to do a detailed investigation and understanding, but these two temples are Chang'an incense extremely prosperous Buddhist temples, every year to the temple to worship the Buddha incense thousands of believers, plus Gu Sheng is in the temple of the Dharma logistics office on an errand, all the believers who go to the temple to worship the Buddha incense can contact him, so ......"

"Did the general ask the monks and nuns of Wanshanni Temple why Gu Sheng switched from Wanshanni Temple to Daxingshan Temple two years ago to make a living?"

According to the side understanding of the last general, it seems that he went to Jiangnan with the King of Jin because of his will, and Gu Sheng had no backer in Chang'an, and was swept out of the Wanshanni Temple and driven out. Oh, the last general also learned that the person who introduced Gu Sheng to Daxingshan Temple to do miscellaneous labor was Liu Chang, the father of Liu Jushi, Peng Guogong. For this reason, the last general went to ask Liu Chang for the reason, according to Liu Chang, he saw Gu Sheng living on the streets, out of pity, he introduced him to his permanent residence in Daxingshan Temple to make a living. Regarding this matter, it has also been corroborated by the monks of Daxingshan Temple. Qu Tutong replied truthfully.

"Things are so coincidental, Liu Chang introduced Gu Sheng to Daxingshan Temple to make a living, two years later, Gu Sheng pretended to be his son Liu Jushi to rebel, if no one is behind it, deliberately arranged, I'm afraid it's unbelievable." Pei Yun questioned.

"The last general had the same suspicions as the metropolitan office. However, if you want to find out who is behind the scenes, you can't do it! Qu Tutong said helplessly.

"Well, General Qu said that Gu Sheng was swept out of the Wanshanni Temple two years ago, that is, in the eleventh year of the emperor's reign, according to this time, it coincides with the time when his sister Gu Pan left Chang'an, however, the time when Gu Sheng left Wanshanni Temple was also the time when the imperial court quelled the rebellion of all parties in the south of the Yangtze River, and at that time, a large number of Nanchen ministers and generals had moved to Chang'an to live, did General Qu ever think that the culprit who made Gu Sheng's rebellion was hidden among these people?"

Qu Tutong flashed a glance at Pei Yun and asked rhetorically: "Nan Chen's subordinates and generals are as many as hundreds, I wonder if the Metropolitan Records Office can further narrow the scope of suspects to facilitate the investigation?" ”

Pei Yun received a slap in the eyes of Qu Tutong, Fang suddenly realized that in his eyes, he was also Nan Chen's subordinate, his face couldn't help but flush slightly, and because he thought that most of Nan Chen's courtiers and their families believed in Buddhism, it was not of much practical significance to narrow down the scope of the investigation according to the article of believing in Buddhism, so he got up and thanked Qu Tutong and said goodbye, saying that he still needed to go back and sort out and consider it before he could give a satisfactory answer to Qu Tutong.