บท 317: Chapter 105: This Grandson is Incredibly Astute! (Please Subscribe)_6

At this moment, he couldn't seem to figure out how Cheng Guang had uncovered this information, no matter how hard he thought.

Duke Zhen Guo, Cheng Shiyuan, considered his own intelligence-gathering capabilities to be quite remarkable.

Through Cheng Zhihai and the Bureau of the Lamp, he could learn about all the major events about to happen in the world.

Yet even so, it was only after a reminder from Cheng Guang and a deliberate inquiry that his subordinates, after quite some effort, became aware that something was amiss with the Great Yan Dynasty's court recently.

Overall, it was still calm.

If Cheng Guang hadn't reminded him and he hadn't sent people to investigate on his initiative, he wouldn't have learned this news for quite some time.

Duke Zhen Guo, Cheng Shiyuan, couldn't help feeling impressed at the moment; his grandson was truly extraordinary.

Capable of discovering the Devil Emperor's smuggling routes, and also able to find out about the missing crown prince.