After the two separated, Yin Qi'an returned to her residence, and she took out a strip of cloth from the brocade bag behind her, which was dark blue as a whole, but there was a thin layer of ash attached to it, which looked like it had just been taken out of the fire.

Yin Qi'an instructed Xiao Er to bring a basin of clear water, put the cloth strip into the clear water, and under the ripple agitation, the ashes on the cloth strip gradually detached from the cloth strip and scattered on the clear bottom of the basin.

Picking up the strip of cloth that had been washed, Yin Qi'an looked at it carefully, and a few traces of light blue stripes were faintly revealed on the strip, judging from the broken stripes, this was clearly a totemic print of clouds.

"Hehehe, that's interesting......" Yin Qi'an's hand holding the strip of cloth shook slightly, and a fierce light flashed in his eyes.

Just as Yin Qi'an was about to take out a brush and draw the pattern on the strip of cloth, the door was suddenly pushed open from the outside, and Qiao Lan walked in panting.

"Qiaolan, how is the investigation going?" Yin Qi'an frowned and asked.

Seeing that she didn't answer Yin Qi'an's question, she walked straight to the table and sat down, picked up the water cup on the table and poured herself a glass of water and drank it all, before she spoke: "Miss, everything has been investigated." On the night of the incident, someone saw that a large number of officers and soldiers had poured out of the castle guard's mansion to advance in the southern direction, and it was impossible to verify the specific time of that night, but it was certain that the castle keeper was not in the mansion that night. ”

"Well, you're doing a great job!" Yin Qi'an picked up the kettle and poured Qiao Lan a new glass of water, as if he suddenly thought of something: "Oh, by the way, there will be a banquet in the City Guard Mansion tonight, do you want to go?" ”

Qiao Lan's eyes lit up after hearing this, and her voice raised several scales due to surprise: "Really? ”

But then Qiao Lan seemed to think of something, and lowered her head in embarrassment: "But...... Miss, there is no way for low-level maids like us to enter the venue for this kind of banquet, and ...... And the castle watcher won't ......?"

How could Yin Qi'an not understand what Qiao Lan was thinking and worrying about? She got up and walked to the window, looked at the bleak scenery outside the window, and felt depressed: "This person is not so easy to deal with." First of all, he didn't disarm and surrender when he knew that I doubted its identity, so he held a good man's shelf all day. ”

"But, Miss Yin, will this banquet be a Hongmen banquet for you?" Qiao Lan stepped forward and asked again.

Yin Qi'an chuckled and said: "If he wants to kill me with poisonous wine, he must use a wine glass, and only with a wine glass can there be evidence that he intended to harm others." ”

Qiao Lan didn't know how to continue to ask about the whole thing, but one thing was obvious, that is, if the city guard was really the murderer and didn't want the accident to be exposed, he could only make this decision and murder Miss Yin at the banquet!

But...... What did Miss Yin mean by the wine glass?

In the evening, when the lights are on, pedestrians in the city begin to stop what they are doing and rush home to eat and rest, ready for tomorrow's challenges.