It was dark early in winter, and it was already dark before five o'clock.

Huang Quan had dinner at Cao's house in Mayuan, and then returned to the city while the night was dark.

In fact, during the day, Huang Quan had already found that the police station was investigating him, so after returning to the city, Huang Quan was very careful and deliberately asked the rickshaw driver to make most of the circle in Xiaowenfang next to Rende Girls' School. Then he got off in Baiyi Lane on the other side. After confirming that no one was following him, he walked back and slowly to Rende Girls' School's apartment.

At this time, Huang Quan was no longer the same as before.

At this time, Huang Quan was a spy under the name of the Japanese Ministry of Internal Affairs' Special High School, and had received three years of training at the Tokyo Agent School!

When passing by the doorman, he greeted Lao Li as usual.

Old Li responded, no different from the past.

Rende Girls' School Apartment is also a typical tube-shaped structure. After entering the gate, there is a staircase. Follow the stairs to the third floor, then turn right into the corridor, and walk to the first room on the south side, which is Room 302, and opposite to 302 is Room 301. Before opening the door, Huang Quan habitually glanced at Room 301 opposite the corridor.

The door of Room 301 is tightly closed, without any abnormalities.

After checking the envelope under the door and the hair on the door handle, everything was normal.

Huang Quan's always tense nerves completely relaxed, opened the door, picked up the envelope on the ground and prepared to enter.

Huang Quan, who had already relaxed, did not notice that there was a small hole in the door of Room 301 opposite, and a black blow tube stuck out silently from the hole.

After a moment, a poison needle was sprayed out from the blow tube, hitting Huang Quan's back of the neck accurately.

Huang Quan felt a slight pain in the back of his neck. He thought it was a mosquito bite. Subconsciously reached out to pat him, but found that his right hand could not be raised and his left hand became weak. The envelope held in the palm of his hand fell on the floor with a thud. Then, even his vision began to blur. At this time, Huang Quan realized that he had been plotting against him.

Huang Quan subconsciously wanted to draw the gun, but his hands were completely out of control.

The next moment, he fell heavily to the ground. In a trance, he saw two vague figures walking out of Room 301 opposite, and then he knew nothing.

"Anesthesia needle!" This was Huang Quan's last thought.

...

Let’s talk about Zhong Yi later.

Gong Weiqian came to Zhong Yi to report on his work with the design drawings of Zhaobaoshan and Jinjishan Fortress. Zhong Yi asked someone to call Zhang Yuanxi over and discuss it together.

When Zhang Yuanxi arrived, Gong Weiqian introduced: "Mayor, Brother Yuanxi, today I was on the construction site. I suddenly thought of a serious problem. The cannons from Zhaobaoshan and Jinjishan Fortress were probably not enough to prevent the Japanese Navy from entering Yinjiang, especially the small-tonnage gunboats of the Japanese army. They were very agile and the fortress cannons were difficult to hit!"

"I have thought about this, too," said Zhong Yi, "but I didn't think of an effective response."

"This is indeed the case." Zhang Yuandao, "Fortress guns are very effective against large-tonnage warships with large size and slow steering. For example, battleships or cruisers, it is difficult to avoid cluster artillery shelling of fortress guns, but for small gunboats less than 500 tons, fortress guns are almost useless."

"So you have to use mines!" Gong Weiqian said, "Use mines to block the waterways between the fortresses!"

"Use mines to block the waterway?" Zhong Yi shook his head like a rattle and said, "This is not OK!"

"Yes, this is absolutely not possible!" Zhang Yuanxi shook his head repeatedly, "Mine is not eye-catching. It will not avoid ships from other countries and only blow up Japanese ships. So once mines are laid, the communication channel between Yinjiang and the outside world will be completely cut off! Our industrial park will be yellow!"

If the Yinjiang Industrial Park wants to operate, it must continuously input raw materials from the outside world, and a considerable part of the raw materials must be imported from overseas by sea.

Gong Weiqian was obviously prepared for this.

At that moment, Gong Weiqian pointed to the map and said, "Mayor, and Brother Yuanxi, you see, we can completely convert the materials that were originally landed in the city to the Zhenhai Pier, then take the railway to Jiangbei Station, and then transport them to the industrial park on the west bank of the Fenghua River by boat. Although the intermediate process is a little more complicated, the safety of the entire city is guaranteed!"

Zhong Yi said: "In this way, the safety of Yinjiang City is guaranteed, but what if the Japanese bombed the Zhenhai Pier? What should we do? Once the wharf is blown up, the material input channel will be cut off!"

"The wharf can be repaired if it explodes." Gong Weiqian insisted, "In order to ensure the safety of the city, I think this price is affordable! It is at least better than letting the Japanese Navy's gunboat break into Yinjiang, Yaowu and Yangwei?"

At this time, Zhang Yuanxi suddenly said: "Wei Qian, can we design a more complete plan that really allows the mines at the mouth of Jiangkou to only blow up Japanese ships, rather than ships from other peaceful countries?"

"How is this possible?" Gong Weiqian said, "The thunder has no eyes, right?"

"The mine has no eyes." Zhang Yuanxi smiled slightly and said, "But we can help it install eyes."

"Put the water mine on your eyes?" Gong Weiqian said blankly, "Brother Yuanxi, how is this possible? Are you kidding?"

"I'm just making an example, not really having to put my eyes on the mines." Zhang Yuanxi said, "For example, when ships from other countries enter the Yinjiang channel, we can let the mines sink to the bottom of the river. When the ships of the little Japanese ships enter the channel, let the mines rise, so that we can identify them with each other?"

When Zhong Yi and Gong Weiqian heard this, their eyes immediately lit up.

Gong Weiqian said excitedly: "This is completely possible. As long as the mine is added to the counterweight, it can sink to the bottom of the river!"

He paused for a moment and said, "We can pull an iron cable between Zhaobaoshan Fortress and Jinjishan Fortress, and then tie a certain number of counterweight mines on the iron cable. Usually, the mines and the iron cables will sink to the bottom of the river. Only when the Japanese warships invade, the iron cables and the mines will be slammed, which will perfectly achieve the effect of blocking Japanese ships."

"No, there are still hidden dangers in this way. The Japanese Navy only needs to concentrate the fire of the ship gun to break the iron chain, which can destroy our blockade of the waterway." Zhong Yi shook his head and said, "So the iron chains and mines cannot be exposed to the water surface, and the winch on both sides of the shore cannot be exposed to the firing boundary of the naval guns on the river surface, but must be hidden."

Gong Weiqian said: "The mayor means to first fix an iron cable horizontally at the bottom of the river, then fix the mines on the iron cables, and let the mines hide below the waterline and not float to the surface?"
Chapter completed!