Chen Jieyang saw that Yu Fan was back, and knew that Yu Fan should have a spectrum in his heart. He also displayed his badge and shouted: "Police! ”

Everyone was stunned, and the crowd saw the police come out, knowing that there was a good show, and there were more and more onlookers.

Yu Fan stepped forward slowly, and the crowd consciously gave Yu Fan a way.

Guo Na also followed Yu Fan and asked softly, "Brother Yu, where did you go just now?" ”

Yu Fan smiled and said to Guo Na: "Oh, I just went to the supermarket here to see if the price of pork is expensive, and I bought something by the way, maybe I can use it." With that, he threw a packet of salt on the table where the water quality test was conducted.

The man with glasses was not panicked at all, he smiled flatteringly, and said to Chen Jieyang: "Comrade police, you may have misunderstood, we are a regular company, not a liar." As he spoke, the assistant next to him took out a stack of materials and showed it to Chen Jieyang.

Chen Jieyang was upright, took the information, threw it on the table, and said to the man with glasses mockingly: "Don't worry about this, you can see what the real experts say first." Chen Jieyang nodded to Yu Fan and signaled that he could start.

Yu Fan took two steps back, so that more people on the periphery of the crowd could see him. Yu Fan said: "In fact, from the beginning, this is an out-and-out scam! First of all, let's talk about the original TDS measuring pen, TDS is the abbreviation of Total Dissolved Solids in English, which means that it is actually the total dissolved concentration (of water containing minerals), that is, the total salts melted in the water, so the level of "TDS" does not represent the quality of the water, which is not an instrument for measuring water quality at all. ”

The crowd was in an uproar, and there was a lot of discussion among themselves, and then someone asked: "But we did see that our tap water became dirty later, and their water was not dirty, which is real, what is going on?" ”

Yu Fan smiled slightly and said to everyone: "This is actually not your water problem, this is the problem of this instrument." This instrument is not actually a water quality detector, just an ordinary water quality electrolyzer. ”

The man with glasses found that his behavior might have been exposed, and quietly moved back, wanting to escape in the crowd, Chen Jieyang's eyes were sharp, and he saw it, but he said very calmly: "Glasses, don't think about running, do you think the crowd will let you run?" You'd better stay close to me, lest the crowd get angry and kill you, and I won't have time to protect you. The man with glasses was so frightened that he didn't dare to move anymore.

Yu Fan continued to give everyone popular science: "The water electrolyzer has two sets of electrodes, each group of electrodes is composed of iron rods and aluminum rods, and the electrodes are put into tap water and pure water respectively when doing experiments. At this time, the glasses scammers explained to everyone, describing these colored substances as harmful substances such as "pesticides", "viruses", "heavy metals", etc., in order to sell their water purifiers. The calcium and magnesium plasma in tap water is an electrolyte, and after the iron rod of the anode of the electrolyzer is put into the tap water, the iron is electrolyzed to form iron hydroxide (gray), ferric ferric ions (green), ferric oxide (reddish-brown), and ferric tetroxide (black); Purified water, on the other hand, does not contain conductive calcium and magnesium ions, and does not undergo electrolysis, so purified water does not change color. ”

The masses don't seem to understand it, after all, people who understand this kind of professional knowledge need a certain level of education, but Yu Fan has been prepared for this situation.

Yu Fan: "In order to make everyone more aware of the reason, I bought a packet of salt from the small supermarket next to you, everyone knows that salt is eaten every day, and it is not poisonous." What if I add a little salt to the water they just purified and don't change color, and then 'measure' the quality? ”

Yu Fan sprinkled a little salt in the water purified by their water purifier, and then inserted the two metal rods of the water electrolyzer into it, and turned it on, and it didn't take long for the water that was still clear just now to become unscrupulous, and even dirtier than the results of the tap water test just now.

The onlookers suddenly realized that they had been deceived.

Yu Fan continued to explain this phenomenon: "Just now, it was still a fairy water that can cure any disease, how could it become 'poisonous' water with a little salt? Because when salt is dissolved in water, there will be a lot of conductive sodium and chloride ions, which will promote the occurrence of electrolysis reaction. There is also the phenomenon of water turning black. So, fundamentally, this gang is a gang of complete liars. Pure water is not necessarily better than our tap water, and proper calcium and magnesium ions are actually helpful to the human body. And I am sure that the water purifier that this group of people sold to everyone is completely costing everyone money. ”

Just now, when Yu Fan began to decrypt, Guo Na had already contacted the local police, and the local police came soon, just in time, and the glasses male trio was only caught.

Chen Jiaoyang communicated with the local police officers and briefly introduced the ins and outs, and Officer Ziyan also communicated with the police in Tashui Town in advance about this matter, so they also learned about the situation in advance. Chen Jieyang hopes to interrogate these three people separately and find clues about Chen Tizhou, because it seems that these three people are very likely to be members of Chen Tizhou's organization. The police here also agreed.

Interrogation room. Although this Tart Water Town is much more dilapidated than the previous Jinbu Town, the interrogation room of the Public Security Bureau looks very new. Could it be the reason for the high quality of the local population? The folk customs are simple? How few people commit crimes?

The glasses man and the other three were divided into three rooms. Yu Fan faced the man with glasses, and Chen Jieyang and Guo Na interrogated the other two separately. In fact, at the beginning, Yu Fan suggested that Chen Frameyang interrogate the glasses man, because after all, he is a professional policeman, and his interrogation skills should be richer, and the glasses man is the main member of the gang at first glance, and Chen Frameyang comes to interrogate, and his identity is also equal.

But Chen Jieyang insisted on asking Yu Fan to interrogate the glasses man. also under the slogan of a Tian Ji horse race, Chen Xiangyang said to Fan that he and Guo Na are both professional policemen, and they will definitely be able to gain by interrogating two little minions, as for Yu Fan, he is not a policeman in the first place, and he is indeed a professional liar, even if he doesn't ask anything, he will not lose.

In fact, Yu Fan knew very well in his heart that this was a chance for Yu Fan to be given by Chen Frameyang, among the three people, only Yu Fan's psychological skills were the best, and to deal with this kind of liar, it was best to kill them with one blow, so trump card to ace, let Yu Fan deal with their core members is the most appropriate. Moreover, Chen Frameyang is still under the guise of Tian Ji horse racing, in fact, it is also to reduce psychological pressure on Yu Fan.

Yu Fan entered the interrogation room, the man with glasses had been sitting in it for a while, and before Yu Fan could speak, the man with glasses opened his mouth first.

"Comrade, you're here."