When Luo Ming was on Earth, he once heard about a spy case -

A university student often buys large quantities of newspapers and magazines and sends some of the information abroad, only to be quickly caught by counter-espionage agents and found out that he has been bought by outside forces.

The newspapers and magazines he bought, of course, did not contain information such as internal references, which were ordinary goods that any normal Chinese could buy. Of course, there are many cases of laymen's blind analysis, false rumors, or whitewashing and distortion of facts.

But even so, with the analysis of those who are interested, a lot of valuable information can be obtained from these commercially available newspapers and magazines.

The fact that the counterintelligence department keeps an eye on this kind of behavior and begins to investigate it as soon as it is discovered, and will search and even immediately forcibly arrest it when there is sufficient suspicion means that it is indeed an effective act of espionage.

After Luo Ming remembered this, he occasionally took time to delve into this aspect, and Aya would also help.

After having a little idea, he consciously trained his spy personnel and taught them some new ideas and strategies.

Of course, it's also bad to let the spy leak out valuable ideas, so he also has different levels of secrecy within the espionage system - but this is off topic.

To get back to the point, the hot springs can be used to gather information from the outside world, which was the main purpose of Luo Ming.

However, it was very surprising that Luo Ming found the comfort level of the hot springs surprisingly good.

Originally, he didn't have much real sense of the statement that his comfort level had been improved to a certain extent, especially when he was already mentally prepared, even if he had far more senses than ordinary people, he couldn't guarantee that his feelings were not affected by preconceived ideas, until he did the following experiment-

In his previous life, Luo Ming had seen the double-blind method that people talked about when arguing about the efficacy of drugs on the Internet, although he was not engaged in research, but the basic idea was still remembered:

Not only do the subjects not know the truth, but even the front-line observers do not know the truth, so that the influence of subjective psychological factors can be prevented to the greatest extent.

Luo Ming used his own strength to invite many nobles under the guise of "low-cost reward", and also allowed a large number of officials and officers under his command to go to the hot springs for free as employee benefits.

Without telling them any truth, Luo Ming asked an unwitting third party to do it, dividing them into two groups that were as similar as possible.

Then, under the premise of controlling the other factors as much as possible, let the two groups enter the two hot springs separately (at this time, there is not much difference between the two hot springs on the surface, the differences are in the places that tourists can't see), and then find another opportunity to exchange them to go to the other hot spring.

Not only did Luo Ming ask the caster to detect their mood changes when they soaked in the hot spring and record them in the form of quantitative values, but he also asked the staff of the hot spring to do a questionnaire after they had finished soaking.

The results were striking: the satisfaction of those who entered the new Spa adjusted by Lomin in the first group was on average 37 percent higher than that of the other group, and 93 percent of the people were more satisfied than the other group.

In the second group of experiments, the satisfaction of those who had soaked in the new hot springs first and then came to the old ones generally decreased.

The other group generally felt "better than the last time", and their level of satisfaction with the spell was honestly proof of this.