If anyone really wants to go here to get the information in that gap, unless they are invisible, they will almost certainly be able to see it through the windows of these two rooms.

However, Hua Zhang also has a concern, that is, from the window, he can see the location of the dead mailbox. On the other hand, from the location of the dead mailbox, you must be able to see this small second floor.

After all, this small second floor was discovered by Hua Zhang and the leader of the second group after on-site investigation. So how can we eliminate the concerns of the spy who won the trust, that is, the black feather.

Hua Zhang was pondering this, when he heard a knock on the door downstairs. It should be that the leader of the second group came back after calling. Hua Zhang didn't say anything, but quietly walked out of the room, lying on the edge of the corridor and peeking down. What if it's not the leader of the second group, but the old maid of the Cang family.

However, the person who came in was really the leader of the second group. When I came in, I was standing in the middle of the hallway, turning my head from side to side to look at the room.

Hua Zhang held the handle with both hands and said, "Have you finished making the call?" ”

"Section Chief." The leader of the second group said: "After the fight, the brothers will come over immediately, I specially ordered to come over in batches and secretly, and in addition, there are people who specially go to buy some food that is not easy to spoil and bring it together." There is also a technical team that will also come with telephone equipment and pull a single line. ”

Hua Zhang nodded and said, "Very good, you come up and take a look." ”

The leader of the second group, "Deng Dengdeng", quickly went upstairs, and Hua Zhang took him to look at the bedroom in the middle, as well as the bedroom on the right. Eventually two people stood in the right room, on the inside of the window.

Hua Zhang said: "This position is very clear, if our target comes to win trust, it will almost inevitably be seen by the brothers here." It's just that we still have to find a way to dispel the other party's doubts, after all, if we can see him, then the other party can also see this small second floor. ”

The leader of the second group nodded after hearing this, and said, "What the section chief said is true." That...... How about we get a sheer curtain? The man stood a meter behind the curtain. In this way, our brothers can see the situation outside clearly through the curtain. But it is impossible for people outside to see the situation inside the house clearly. ”

"Nope." Hua Zhang said: "If the other party is alert, as long as he sees that there is a gauze curtain in the window on the second floor, he will immediately suspect that he may be being watched." ”

"Hmm." The leader of the second group said, "What about hiding on the side of the window?" If it's daytime, the sun shines in. But the side is in the shadows, and when you look inside from the outside, it's not easy to spot us. ”

"Yes, yes." Hua Zhang said: "But after all, it's too close, and it's not very safe." Think about it, when is the other party in the most alert state? It must be that you are about to get the letter, but when you haven't taken it yet, you are the most vigilant. When he turned around, he could see the second floor. And that location can only be seen from this second floor. Psychologically, he must pay extra attention to this place. ”

The leader of the second group also frowned when he heard this, but he admitted that what Hua Zhang said was very reasonable. But it's not okay not to monitor on this second floor, because it's like Hua Zhang said, and only on this second floor can you see the location of the dead mailbox at the head of the red brick path. So you can't change places.

Hua Zhang said after a while, "How about the periscope?" ”

"Huh?" After hearing this, the leader of the second group had a look on his face and said, "It's okay to look at the periscope at a humble level." We can even make a mirror and cardboard ourselves, and we can make one very quickly. And the cardboard looks at the outside end, the mirror can be set deeper, even if there is sunlight, it will not cause reflection.

The observation end of the periscope can also be made a little smaller. Anyway, there is a certain distance from the red brick path, and the view is definitely enough. Our people hid under the inner windowsill and sat on a small stool, not visible from the outside. The windows can also be left open. Even at night, the lights can be turned on.

In this case, you will be able to see the situation in this room clearly. And if he can't see people, he naturally won't doubt it in his heart. ”

Hua Zhang said "um", but still didn't say anything, even if using the periscope was her own idea.

Then Hua Zhang leaned down and looked at this window, if the periscope was the observation point, it was placed on the windowsill. In this case, there may be an extra object when viewed from the outside window.

Because the window is a "mouth" shape, if the observation port of the periscope is placed on any one of the points, although it is only a small point, it is still redundant.

If the other party's vigilance is very strong, then this small superfluous thing may also make the other party suspicious. It was a square window after all, and there was an extra extraneous thing coming out. The main thing is still that problem, from the dead mailbox, you can only see this second floor. Then the other party will almost certainly maintain the highest vigilance on this second floor.

Thinking of this, Hua Zhang also told him about this concern, and then said: "How about this, let's get a periscope, but not in the window position, but in the middle of the house slightly against the wall." The location of the red brick path can also be seen here. And then, how about we add a little bit of lampshade to this periscope? ”

"That's good." The leader of the second group smiled: "In this way, even if he sees it, he just thinks it is a vertical lamp." We can even actually go buy a standing lamp and stick the periscope together against the pole. The position of the lens is slightly inward. If you turn the light on, the light will shine backwards, and from the outside, everything will still be normal. ”

Hua Zhang said: "Well, I think it's okay." Then this sitting standing lamp, as well as the periscope materials, you can get it. The brothers may already be on their way to this side. ”

"Yes, then I'll go and get ready now." Seeing that Hua Zhang no longer had any orders, the leader of the second group turned around and went downstairs directly and went out of this small second floor.

Hua Zhang stayed here, waiting for the brothers at the monitoring point, as well as the technical team to come and pull a phone line.

Taking advantage of this time, she first checked the house, mainly the movement of various electrical wiring. About ten minutes later, the team from the first surveillance point came.

Then, about every five minutes or so, an agent from the Special Investigation Section came in, four people in total. The last one was carrying a big bag and dressed as if he were a worker.

Hua Zhang took them upstairs and explained all the requirements and precautions to them.