Xu Tian closed the cold window and returned to the dining table.

There are also three dishes, all of which are Sitong's favorite dishes, and Mr. Xu didn't move a bite.

Recalling the questions asked Mr. Xu, Xu Tian felt a chill down his spine, although Mr. Xu didn't admit anything, but Mr. Xu's true identity, Xu Tian was already very clear.

At 8:20 p.m., Xu Tian and Sitong had finished eating the food on the table, and as soon as they put down their chopsticks, they heard a sound of footsteps upstairs.

Kang Yuliang staggered down and took the plate, and after Kang Yuliang went upstairs, Xu Tian began to look left and right.

"What are you looking for?" Sitong asked.

"As soon as we finished eating, he came down to collect the plates, and there should be surveillance here, or someone transmitted information to Kang Yuliang through electronic communication equipment." Xu Tian said.

"Let's go up and have a look! I'm always a little worried. Sitong said.

"Don't worry about the red girl?" Xu Tian asked.

"Well...... Sort of! Sitong became hesitant.

Xu Tian understands Sitong's mood very well, after all, Hongmei is Sitong's adoptive mother, if Sitong is not worried about Hongmei, Xu Tian will feel that Sitong is abnormal.

"It's almost time, Mr. Jin should find out the movements of those people." Xu Tian said.

"You trust Teacher Jin so much?" Sitong asked.

"Of course, although Mr. Jin didn't say it, he has already revealed the information to me." Xu Tian took out Mr. Jin's mobile phone from his pocket and said with a smug expression.

At this time, Sitong suddenly came to his senses, remembering that Teacher Jin was pulled downstairs by Xu Tian once, and it didn't take long for Teacher Jin to throw off Xu Tian and run upstairs again, it must have been at that time that Teacher Jin secretly handed over his own mobile phone to Xu Tian.

Xu Tian flipped through Mr. Jin's mobile phone, clicked on the document, and sure enough, there was a text left by Mr. Jin.

"The message written by Mr. Jin! Sure enough, it didn't disappoint me. Xu Tian said complacently.

"What are you writing about?" Sitong asked.

"There are everyone's introductions on it, first of all, Kang Yuliang, Mr. Jin found out that he was pretending to be drunk, in fact, Kang Yuliang didn't drink after he went upstairs, his wine bottle was full of grape juice." Xu Tian said.

"Grape juice? It's impossible for Mr. Jin to come into contact with Kang Yuliang's wine bottle, right? Sitong asked.

"The smell! People who understand red wine can distinguish the brand and year of red wine by smell, even if Mr. Jin does not understand red wine, but the smell of grape juice and red wine is completely different, so Mr. Jin should distinguish by smell. Xu Tian said.

"What else?" Sitong asked.

"Then there is the scar man, Mr. Jin said that the scar man did not show the appearance of overeating, which shows that the scar man's stomach is not very hungry, and he has been lying to me since he entered the door." Xu Tian said.

"What is the motive for lying to you that you are hungry? If he wants to go upstairs, it's reasonable to ignore you! Sitong said.

"It's not clear, in addition to the scar man and Fang Lu, Fang Lu has been whispering with Hongmei, and the two of them have become a combination." Xu Tian said.

"This is expected, it would be nice if Aunt Xu was here, Aunt Xu and I could talk more than my mother." Sitong said.

"According to Li Zhitong's speculation, some of the people upstairs are the personal assistants of the Tai Sui." Xu Tian said.

"Who is it?" Sitong asked.

"At present, the people who are more okay are the squinting young men, and Huang Quan!" Xu Tian said.

"Would Huang Quan do such a thing? I don't remember that Brother Huang Quan had time to meet with Zhinian Tai Sui. Sitong said.

"Regarding the matter of Huangquan, I will tell you later, the entry point for tracking the Zhinian Tai Sui must be Huang Quan, as long as the suspicions on Huang Quan's body are solved, we will be very close to the Zhinian Tai Sui." Xu Tian said.

"Any other information?" Sitong asked.

"No, Teacher Jin shouldn't have figured out the information of other people, after all, Teacher Jin can't observe so many people alone, and the rest of the people should be observed by Li Zhitong, but I can't touch Li Zhitong, that guy seems to distrust me." Xu Tian said in annoyance.

"Why doesn't she trust you? You also helped the police with a lot of things. Sitong said indignantly.

"I don't know much about Li Zhitong, this woman seems to be the elite of the police, Lao Chen said that Li Zhitong is his last trump card, presumably Li Zhitong's position in Lao Chen's heart is also very important, we can only choose to believe in Li Zhitong, as for Li Zhitong or not, that's her business, I just need to cooperate with Teacher Jin." Xu Tian said.

"Is that all there is at the moment?" Sitong asked.

"Finally, there is another paragraph, Mr. Jin told me to go upstairs after solving the matter downstairs, it seems that Mr. Jin also knows about Mr. Xu coming to talk to me." Xu Tian looked upstairs and said.

"Shall we go up now?" Sitong asked.

"There's nothing more to say, go up! But before I do that, I'll tell you. Xu Tian said.

"You don't have to worry about me, I'll find a way to get close to my mother when I go up, and if I find anything wrong, I'll find a way to inform you." Sitong said.

"I'm glad you did, but here's what I want to tell you...... Be careful with your personal safety. Xu Tian said.

"I'm not a child anymore, don't worry! I can protect myself. Sitong said.

"Do you remember the red line we bought in the northern scenic spot?" Xu Tian asked.

"Of course I remember that if it weren't for that red line, I might have been swept away by the flood." Sitong said.

"Did you take that red thread with you later?" Xu Tian asked.

Sitong didn't say a word, he directly rolled up his cuffs, and Xu Tian saw that the red thread was still tied to Sitong's arm.

"The quality of this red thread is very good, you have to take good care of it." Xu Tian said.

"Huh? Why are you saying this? Shouldn't you say something else? Sitong was surprised.

"You're still happy to have me." Xu Tian said with a little embarrassment.

"That's it? You're too perfunctory too. Sitong said.

"I ...... I'm not perfunctory. Xu Tian looked a little overwhelmed.

"You just have, from the beginning you always say some inexplicable things, if you have anything to say, just say it to me, can you not beat around the bush like this?" Sitong said with an unhappy face.

"I ...... Actually, I wanted to send Sitong out. Xu Tian said.

"Where to send me? Is it outside? Sitong asked.

"There should be a way to get out of this building upstairs, I want to do an experiment while everyone sleeps, and if my reasoning is correct, the other side of this building will be the key to unlocking the mystery." Xu Tian said.