Chang Geng was stunned, he suddenly felt that Gu Yun's words were not only about the barbarians but also seemingly to warn him about something else.

https://www.northwestflower.net/sha-po-lang/book-3/chapter-13-new-politics/13-iv

Chang Geng had gone too smoothly through this period of time. First, he solved the problem of Jiangbei perfectly, all his set goals were achieved. On the way back, he was also accompanied by Gu Yun. Except for the days in Yanhui town, since Great Liang had been suffering from a shortage of troops and continuous chaos, Gu Yun seldom had the chance to be with him for such a long time. It let a person have the illusion of being able to stay by each other's side until heaven and earth grew old, completely unable to feel the silence and cold at the beginning of autumn and winter.

Chang Geng used to be extremely uneasy, cautious about everything around him, a hint of a clue could alarm him. At that time, although his nerves were tense all day long, he was truly thorough with his calculations and seldom made mistakes. At this time, he was trapped in gentleness for many days. After one of Gu Yun's words, he was surprised that he had felt too triumphant.

Chang Geng steadied his mind and silently recalled the scene in which Li Feng summoned him to the palace for a moment and found it quite strange — the current ruler shrunk into a room filled with heady medicinal scent, the thick palace and the quiet attendants gave off the aura of gloomy whither, everywhere there was the scent of death, but Li Feng was still in his prime, how could he be senile? What would he feel inside?

For some people, when experiencing their own incompetence, they would become disheartened and willingly step back, but Li Feng would never be that kind of person. If it was so easy for him to give in, he would not angrily step out of the crowd when the Northern Camp’s uprising happened, nor would he have boarded the Red Kite when soldiers surrounded the capital.

Gu Yun truly did remind him. Chang Geng was startled, a little cold sweat oozed from the back of his neck, and the delightful expression on his face quieted down.

Gu Yun knew that he had understood. This person was too smart. Sometimes, only one word was enough. Without saying more, he reached out and patted Chang Geng's head.

Chang Geng grabbed his hand and pulled it down. Gu Yun waited for his self-reflection in the meantime. He thought that at the very least, he would hear such words as ‘What am I supposed to do without Zi Xi?’. Unexpectedly, Chang Geng held his hand for a while, not only did he not reassess himself, but also made an unreasonable blame: "It's all your fault, making me delirious."

Gu Yun: "..."