Qingcheng Police Station.
After a night's sleep, Xu Zhiyong felt refreshed.
Indeed, there were all sorts of things in his dreams.
When Xu Zhiyong returned to the office, he found that in the spacious office, only Gu Sinan was present.
"Captain Gu, still busy, huh!"
Chewing gum, Xu Zhiyong chuckled and walked over to Gu Sinan's desk.
Gu Sinan, however, completely ignored Xu Zhiyong, focusing intently on the screen, seemingly engrossed in something.
Xu Zhiyong approached and saw that it was a video clip.
At first glance, Xu Zhiyong didn't pay it much mind.
Instead, he noticed on Gu Sinan's desk a letter written in childish handwriting.
"Eh? This couldn't be the legendary... thank-you letter, could it? Who sent this?"
In this era, electronic information technology had become very advanced, and handwritten letters had almost become a thing of the past.
"Someone sent it over this morning via a robot."
Gu Sinan lifted his head, and his haggard face appeared somewhat pale.