There is a clear record in the codex that the place where Liu Dianchen overheard the meeting of the senior Japanese military officials was Fengping City in Zhaoyun Province, which was not only the provincial capital of Zhaoyun Province, but also one of the main power centers of the puppet Manchu regime.

Since the secret meeting was held by high-ranking Japanese military officials from here, it means that the original treasure was most likely hidden in the mountains near Fengping City. In that year, when the military commander investigated, it also took Fengping as the center and regarded this area as a key area.

However, if you look at it from the map, you will find a very helpless fact, Fengping City is surrounded by mountains, and the southeast, northwest, and northwest are all deep mountains and old forests, all of which are counted together, at least thousands of square kilometers.

It's no wonder that the Japanese devils chose this place to build a fortress and buried the treasure, and it was really difficult to find it!

In the notebook, Tao Xiang's search for treasure is recorded. Tao Xiang's investigation of the treasure is divided into three directions:

First, it is mainly to collect clues from historical materials.

This is very important. Over the years, Tao Xiang has consulted countless local historical materials, interviewed countless villagers, and has been tirelessly inquiring about the treasure.

Tao Xiang's starting point is very clear, he believes that if such a secret fortress really exists, then its construction process must be similar to that of Shengshan Fortress, and the Japanese devils will definitely use Chinese workers from other places to build it, and after the construction is completed, it will inevitably kill people and create a tragedy of a thousand people.

Therefore, Tao Xiang tried to find such a pit of a thousand people, so as to judge the general location of the secret fortress.

In addition, he also believes that if the Japanese devils want to keep the secret, they may commit an even more heinous act, that is, they will raze the villages near the fortress, leaving no one alive, so as to prevent the fortress from being discovered by the local people!

Therefore, if you can find a village similar to the one destroyed by the Japanese army, you may be able to determine the location of the fortress.

The reason why Tao Xiang took Cui Lizhu to settle in the Golden City was because he had received news that the ruins of many abandoned villages had been found in the mountains outside the Golden City.

However, after careful investigation, he regretted to find that the villages were not caused by the Japanese, but by environmental degradation.

Tao Xiang's second direction is field trips.

According to the records of Liu Dianchen's codex, he went to the scene to look for clues, trying to find clues about the activities of the Japanese army.

To this end, he has purchased valuable professional equipment and learned a lot of professional knowledge. However, the scope was too large, and this method was tantamount to looking for a needle in a haystack, and finally had to give up.

Just behind Tao Xiang's notebook, there are many schematic diagrams of mountainous areas, most of which are marked with a big "X", indicating that the place has been excluded by Tao Xiang.

As for the third direction, that's the people involved!

Tao Xiang also believes that it is really impossible to determine the existence of the treasure based on Liu Dianchen's codex. Therefore, he spent a lot of time and used his profession to conduct a detailed investigation of all the people and events related to the treasure.

Over the years, he did find out a lot of intriguing news, such as after the defeat of the Kuomintang, they still did not give up on the treasure, and sent spies to look for it many times, but not only did they find nothing, but they also accidentally leaked the secret of Liu Dianchen's codex.

The one that Tao Xiang accidentally obtained was one of the missing copies.

Tao Xiang suspected that the interrogation codex he obtained should only be a small part of the entire codex, and he could only understand a general history, and there should be more detailed information left in the world.

Secondly, such an astonishing fortune may be located in the territory of the Northeast. At the national level, it is also impossible to sit idly by.

Through Tao Xiang's investigation, he can already confirm that since the founding of the People's Republic of China, China has also organized many search operations for treasures. The government has sent many well-known experts and scholars, combined with advanced scientific detection technology, to search for many times, but in the end, it has not been successful.

In addition, Tao Xiang also received two pieces of information from unknown sources that the Russians and the Japanese were also looking for the whereabouts of the treasures.

Regarding these two pieces of news, Tao Xiang felt that the affairs of the Russians were a little more reliable, after all, it was the people who were the sufferers, and it was reasonable that they were still worried about gold.

Although it is possible that the gold is hidden in China, if it is found, there is still hope that they can recover it through legal means. More importantly, if the gold can really be found from the secret fortress of the Japanese army, they will be able to prove the fact that the Japanese have robbed the gold, and accordingly put it into legal means to formally claim compensation from the Japanese government!

As for what the Japanese are also looking for, Tao Xiang feels that it is pure nonsense. First, the treasure was buried by the little Japanese, and of course they knew the location of the treasure, so did they still use it to find it? Second, if they came to China to look for the treasure, it would be extremely stupid, and even if they found such a huge treasure, what could they do with it? In the end, they could only make wedding dresses for others, but the gains outweighed the losses.

"Tut-tut......" Cui Lizhu looked at Tao Xiang's notes and smacked her lips, and gradually regained her senses, "Boss, this matter, it's really hard to get it! Since our country has sent so many experts and haven't found it, then let's ......"

"Right?" Zhao Yu nodded proudly, "I just said, it is impossible for our country to sit idly by and watch such a big thing! Let me tell you again, maybe, those treasures have already been pocketed by our country! It's just that they haven't been announced to the public! Because there is a dispute over gold, it is very reasonable not to announce it to the public!"

"Alas......" Cui Lizhu was like a deflated ball, patting Zhao Yu on the shoulder with her hand, "Boss, your level is not low, why don't you find someone to ask?" If there is really no treasure left, let's stop doing useless work, right?"

"Just kidding!" Zhao Yu shook his head, "I'm a big treasure at this level, such a big treasure, even the biggest leader of the Criminal Department doesn't have the authority to know about it!"

"That's right...... ......," Cui Lizhu asked again, "Just ask who has the right to know?"

"What are you doing?" Zhao Yu glared, "You don't want to go back to your old job, do you?"

"Tut-tut......" Cui Lizhu was depressed, "Then what should we do? Let's go to find the treasure without knowing anything, isn't that the same as catching blind?

"I don't know this truth yet, let's not do this......" As he spoke, Zhao Yu opened the notebook, pointed to the names of many people at the back of the notebook and said, "This is the list of people left by your father." The people on the list should all be related to the treasure! You see, some of the names at the top of the list have been hit X by your father, and only the latter ones are left!"

"Oh......" Cui Lizhu pondered, "If you hit X, my dad has already investigated?" So...... ...... who didn't hit the X"

"You see, there are still five people here who have not been marked with an X," Zhao Yu said, pointing to the list, "Either your father has not investigated them, or these five people are closely related to the treasure and know more about the secrets." So ......"

"Oh......" Cui Lizhu suddenly became excited again, "Let's investigate these five people now! See what they all know? If the treasure has been found, then we can die! But if we don't find it...... Hehe...... Then you, Detective Zhao, will have to work hard!"