Fortunately, the battle inside the passage did not last long. In less than half an hour, the commander of the guard platoon, who went down to search, returned to the ground with his troops and a few Japanese prisoners. It's just that when he returned to the ground, his platoon of more than thirty guards was only half of the people left.

From the report of the guard platoon commander, it was confirmed that Du Kaishan's original judgment was not wrong. The passage found in Haiguang Temple is connected with the secret underground fortifications of the Japanese army that were discovered before. In other words, this passage, together with the underground secret fortification group discovered before, is an integrated emergency headquarters.

Perhaps the Japanese army still has a lot of trust in the concealment it has created. There were no defensive forces at the exit. However, in depth, it is not as simple as this. After the guard platoon went down, he walked only a few dozen meters in the direction of the passage before he encountered about a small group of Japanese troops.

This group of Japanese troops was extremely well-armed, but one of the Japanese troops in a small group was equipped with three light machine guns. The guard platoon that went down to clean up took a lot of effort to completely solve this squad. Although they were armed with submachine guns suitable for close combat, they were stubbornly counterattacked by the Japanese and were in too straight passages. In the close-range melee, his own casualties were not light.

Soon after the Japanese alert team was resolved, they joined up with their brother forces who had come down from the other direction to search. Now that the brother forces are continuing to clear the underground fortifications, they are worried about the safety of the headquarters, so they return to the surface with the prisoners transferred by the brother forces.

Regarding the report of the guard platoon, Tao Jingfei frowned and didn't say anything, just looked at the few Japanese prisoners in front of him who were tied up quite sturdily. waved his hand to the intelligence department behind him, and quickly took over the two officers. He wanted to find out the specific identities of these Japanese soldiers as soon as possible. As for the soldiers, let's tie them up first, and send them to the prisoner of war camp in Yang Village when they are completely cleaned up. ，

The intelligence services acted quickly, and through the interrogation of the prisoners, they soon got first-hand information. These Japanese soldiers were exactly what Tao Jingfei was looking for before, the personnel of the General Headquarters of the Japanese Army in Tianjin. Their previous headquarters, as Du Kaishan expected, were not set up in the concession area. Instead, it is set up outside the east gate of the rather inconspicuous old Tianjin County, in the former first district office of Tianjin Special City.

However, because these prisoners were all members of the guard squadron of the regimental headquarters of the 48th Division, there were no high-ranking officers among them. So it is not clear when exactly this secret underground command post was built and how big the real scale is. All they knew was that there were not many defenders in this underground fortification, and the details of the places they passed through and were responsible for defending along the way.

One of the most valuable confessions was that Lieutenant General Yuyoshi Tsuchihashi was still in this command post before they were captured. Moreover, this secret command post has only two entrances and exits south of the Wallzi River. One is set in Haiguang Temple, and the other is set up in the place where it was found by Tao Jingfei's search personnel before.

Apart from these two entrances and exits, there are no other entrances and exits on the south bank of the Wallzi River. As for the depth of the Japanese concession in the north of the wall, apart from the place where they entered, there were other passages in and out, which was not something that these people could understand and master.

Because these points involve the issues that Tao Jingfei is most concerned about, the intelligence department asked in detail. And the highest-ranking lieutenant among several prisoners of war gave a very detailed explanation. Because in addition to a large number of officers in the underground passage, there is only one squadron that really serves as a guard.

He is the squadron leader of this guard squadron, and all the guard tasks are in his charge and assigned, so he is still very clear. However, because the rank is not enough, except for the officers of their own division. He didn't know who else was in this secret command post at the moment.

It is precisely because the area of this secret command post is not large, and it is only used as a wartime command organization. Therefore, before entering this secret command post, Lieutenant General Tsuchihashi Yuyi did not mobilize other troops, entered this secret command post, and only brought a personal guard squadron.

Moreover, this secret command post, except for a few guards, there were no other defensive units. At the same time, in this underground secret command post, among all the Japanese troops participating in the operation in the urban area of Tianjin, except for Tsuchihashi Yongyi and a few people, even the commander of the 110th Division and the commander of the 59th Division did not know that there was such a secret hiding place in Tianjin.

Although there is not much value in the oral offerings of these few people. But these confessions made Tao Jingfei sure of two things, one is that this secret command post, at the two exits on the south bank of the Wallzi River, has been discovered. The other most critical one is that Yuyi Tsuchihashi and his command are still in this secret command and have not yet escaped. After affirming these two points, Tao Jingfei breathed a sigh of relief in his heart.

And the troops who went down from the other direction to clear the troops did not make Tao Jingfei wait too long. However, the Japanese troops in one squadron had only a limited number of troops left except for a squad that was dealt with by their own guard platoon. Therefore, the clearance operation is proceeding very quickly, although there are still some troops below, who are conducting a careful search along the passage to the north of this secret command post, so as to avoid any fish that slip through the net. But the main battle still didn't make Tao Jingfei wait too long.

Just after Tao Jingfei finished reading the interrogation records, the troops who had completed the liquidation of most of the secret underground command post of the Japanese army returned directly from the secret exit of Haiguang Temple. At the same time, he brought back a Japanese lieutenant general who was knocked unconscious, and a Japanese army commander who was tied up like a rice dumpling, plus the bodies of two major generals and three major generals, as well as the corpses and prisoners of more than a dozen officers above the rank of junior general.

Seeing the Japanese lieutenant general who was captured after being knocked unconscious, a seal engraved with the name of Yuyi Tsuchihashi seized from him, as well as a large number of documents seized from the underground fortifications, and the confirmation of the sworn oath of the guard squadron leader who was no longer human, Tao Jingfei's mind was completely relaxed.

For Tao Jingfei, catching this cunning guy will be regarded as a successful end to the Tianjin operation. The commander of the 48th Division of the Japanese Army, the so-called commander of the Tianjin Garrison, who had dealt with him for a long time on the battlefield and evaded his own troops digging three feet into the ground to clear up the ground, finally met today, and it can be regarded as the end of his own heart.

But at this time, Tao Jingfei's calmness came. Tao Jingfei, who was a little worried about the identity of this cunning guy, did not immediately report the results of the clean-up. Instead, personnel were arranged for the rapid interrogation and screening of prisoners. He had to finalize the identity of all of them before he could report back to One.

The object of this interrogation was different, and compared with the commander of the guard squadron of the 48th Division who had been captured before the interrogation, it took significantly longer. Although this guy Yuyi Tsuchihashi was captured, his mouth is still quite hard. Coupled with the identity of this old brother lieutenant general, the intelligence department still has some mercy. A dignified lieutenant general division commander is not too easy to explain if he makes a miserable mess.

However, for several other officers below the rank of Zuo, including that Zuo, there is nothing to taboo in the intelligence department. After taking certain measures, these Japanese soldiers who thought they were samurai poured beans into bamboo tubes, and said something, so that Tao Jingfei had the detailed information of the entire Japanese army deployment in Tianjin and this underground hideout.

After the Gengzi Incident, after the Japanese set up a concession and garrisoned troops in Tianjin, the construction of this underground fortification group began at the same time as the Japanese barracks set up in Haiguang Temple and the headquarters of the Chinese garrison army. It was used as a high-level concealed command post for the Japanese army in Tianjin, the bridgehead for its invasion of North China.

It is divided into two parts, north and south, and the core is the group of underground fortifications found south of the Wallzi River. However, it is not only the two exits of the south of the wall, but also the residential area of No. 40 Gong in the core part of the Japanese concession of the north of the wall, there is also a rather secret exit. In other words, this secret passage leads directly to the core of the Japanese Concession.

Moreover, the No. 40 residential area of the palace is not an ordinary Japanese residence, it is a secret secret agency set up in Tianjin, the base camp of the Japanese army. The so-called secret service on Fukushima Street was used as a cover for publicity. Attract the attention of relevant Chinese parties to protect its true core.

The Japanese are still very taboo about the Blue Coat Society, the Central Unification before Chongqing, the later military unification, and the spy forces in all aspects. The core of the Japanese secret service in Tianjin is in this inconspicuous Japanese-style villa. Even after the 77 Incident, the Japanese army occupied the entire city of Tianjin, and this secret stronghold still did not give up.

This inconspicuous Japanese-style building, not to mention that the Chinese do not know the real purpose of this place. Even the ordinary Japanese spies who infiltrated Tianjin, all the Japanese expatriates, and even the hardcore traitors who were co-opted by them did not know. People only know that the Japanese Tianjin secret service on Fukushima Street and the Japanese Tianjin Gendarmerie are two demonic existences.

No one knows, except for the Beiping secret service. This inconspicuous Japanese-style building was the site of almost all the Japanese spies infiltration operations in North China before the July Seven Incident. Its earliest actions and existence even extended to the official opening of the Japanese concession after the Gengzi Incident.

All the incidents in North China that are implicated with the Japanese, as well as all the events of one kind or another, have the shadow of this Japanese-style building behind them. Countless sabotages in China's interior, enlisting traitors to serve the Japanese army, and even creating some spy operations that shocked China and foreign countries were all sent out from this Japanese-style building.

It is this place that has always been a secret existence, and the special role of this building. In order to facilitate the rapid evacuation of the head of the secret service here when necessary, as well as a large number of secret materials. The Japanese set up another exit from this underground fortification group here.

However, because of the underground passage connecting the north and south banks of the wall, the project was too complicated and difficult when it was built, and the cost was too huge, so it was never opened. The entrance and exit of this underground secret passage in the north of the wall was chosen within the East Asia Tobacco Company in the Japanese Concession.

Until the Anti-Japanese Federation has occupied the entire Rehe, the striker has entered eastern Hebei, and the situation on the front line of Pingjin has been aggressive. In order to ensure the needs of the Tianjin operation when necessary, under the personal supervision of General Okamura Ninji, several engineers were transferred from the city construction engineering department of the Kwantung Army, which had rich experience in drilling holes. At the same time, four independent engineer squadrons directly under the North China Front Army were transferred in one go, and they worked for nearly a year at all costs before they were finally completed.

After opening the passage to the bottom of the wall, in order to ensure that this secret core fortification is not discovered by the enemy as much as possible. The exit that was set up in the East Asia Tobacco Company was completely blocked. On the north bank of the Wall, on the orders of Yuyi Tsuchihashi, this only kept a secret exit. And at the only exit, a large amount of explosives were prefabricated.