The geographical location of the second line of defense is not as ideal as the first line of defense in Huizhong road tunnel. Fortunately, the engineering team has placed explosives in many places between the two lines of defense in advance. Arrangements have been made for the National Stadium, the swimming pool of the Olympic Sports Center, the roller skating square and the digital museum.

The blasting of Huizhong road tunnel brought unexpected results. When the situation in front was fed back to Shao Yifu, Shao Yifu resolutely sent the third group of about 100 people to the Olympic Park Station of metro line 15, and placed high Bao explosives along the metro track of line 15. This is the third line of defense, and almost the last line of defense, Less than one kilometer away from the subway is the Yanjing Genomics Research Institute of the Chinese Academy of Sciences, where the Tsinghua union department is located.

The last 100 soldiers of the 61889 army stayed at the research institute to carry out the final defense preparations. The explosives and ammunition accumulated in the Institute were distributed, and nothing remained. In the science and Technology Park of the Olympic Village, some buildings have been temporarily transformed into the last fortress. These fortresses have been transformed into fully enclosed structures, like living coffins. The soldiers who enter the fortress have already given up the chance to escape, and left behind as abandoned children to buy time for the transfer work.

The helicopter brigade brought by GE Congxian is still carrying out the transfer work in an orderly manner. No soldier has been transferred from the whole research institute to assist them. The gunfire and explosion sound of the distant battle are getting closer and closer. The scientific research personnel who have boarded the plane are all sweating for the front-line soldiers. They all know that their lives are won back by the soldiers with their own sacrifices. Some people have shed tears sadly.

The helicopters took off one by one. Shao Yifu and Ge Congxian looked at the helicopters disappearing into the sky outside the window. Their feelings were different. Shao Yifu's mood is much lighter. After completing more than half of the task, the rest of the work is to consider how to take the soldiers out as much as possible. The transport capacity of the helicopter brigade and the time factor limit the fighters of the Research Institute. Shao Yifu does not want them to die here.

Ge Congxian is still considering persuading Shao Yifu to evacuate with the second batch of helicopters. Shao Yifu's insistence makes him feel bigger because he received special instructions from Rong Yun before he came. Rong Yun asked him to take Shao Yifu out. It is really impossible to use special means.

"It seems that the chairman knows Lao Shao better," Ge Congxian sighed in his heart. After chatting with Shao Yifu, he turned around and left to make the next arrangement.

Shao Yifu looked back at GE Congxian. He felt that GE Congxian looked strange just now. After thinking about it, he found nothing wrong.

When the helicopter flew over the Huizhong road tunnel, the pilot looked down. The deep pit opened by high Bao explosive has been filled with dense zombies. The corpses on the south side of the tunnel continue to move northward to try to cross the deep pit. More zombies enter the deep pit, and the bodies of the zombies gradually fill the deep pit.

Some zombies heard the sound of helicopters flying overhead and looked up at the aircraft group. The passing of helicopters did not attract the zombies for too long, and their attention was always focused on the front.

The zombies on the north side of the tunnel have begun to be blocked by the retreating defense forces. Before the explosion of high Bao explosives in the tunnel, the number of zombies crossing the tunnel was small, about only a few thousand. During the retreat, the soldiers began to stabilize their formation and fight back. Time and life are passing. The number of casualties of the soldiers withdrawn from the first line of defense begins to rise. The pressure on the north side of the tunnel is much less than before. The soldiers withdraw while fighting on the terrain, and the soldiers of the second line of defense also rush forward to cover.

Unauthorized usage: this narrative is on Amazon without the author's consent. Report any sightings.

The number of soldiers who successfully retreated to the second line of defense was more than 400, and the number of soldiers on the original second line of defense was less than 800, which was equivalent to the defense strength of the first line of defense.

Xu Yongping continued to take over the command of the second defense line and began to deploy defense in the area near the defense line. To the east of the National Convention Center is Yangshan River, which extends southward from the Aohai and Wali lake. Xu Yongping sent people to blast all the bridges across the Yangshan River, making the Yangshan river a natural barrier on the east side of the second line of defense. Several bridges on National Stadium North Road, Datun Road, Datun North Road and Kehui South Road collapsed one after another in the explosion, and the vehicles on the bridge and the reinforced concrete of the bridge body fell into the river. After the four bridges were destroyed, the front of the second defense line was compressed to 800 meters wide, and the defense width of each person was about 1 meter, which reduced the defense pressure of the first defense line by half.

The corpses in the Huiyuan Apartment area on the east side of the bird's nest were isolated in the east of Yangshan River, and could not pose a threat to the defense line and the research institute within a few hours. The number of remaining zombies in the zombie group is about 60000. They begin to cross the deep pit of Huizhong road tunnel and enter the area near the National Stadium and the swimming pool of the Olympic Sports Center, only 500 meters away from the second line of defense. A small number of zombies deviated from the direction, left the zombie group and moved to the West and entered the seventh district of Nanli of the science park.

The zombies left in the corpse group added a lot of variables to the defense. Xu Yongping had to send a small team of 50 people to watch them. At present, the 61889 army cannot dispatch enough forces to eliminate these stray zombies. The task of the dispatched team is to observe the movements of the zombies and give a timely warning to Xu Yongping's department and the Research Institute.

The roads in front of the National Convention Center are half human high roadblocks, which can not only serve as a shelter for the defense forces, but also block the advance of the zombie group. Flags are still flying on the three flagpoles in front of the conference center, and the five-star red flag in the middle is particularly dazzling. Many soldiers look at it consciously or unconsciously, and their faith is also more firm.

The fire in Huizhong road tunnel has been extinguished. Most of the zombies in the zombie group have crossed the first line of defense. The zombies in the deep pit scramble to climb on the bodies of other people. A few zombies have climbed out of the deep pit and joined the team that continues to move north.

Xu Yongping is waiting. Now is not the best time to detonate the explosives arranged there. In order to make all the arrangements achieve the best results, he has been highly focused and his brain has been deliberating and calculating. The cards in his hands were too few to support him to win the war, but this did not prevent him from winning strategically. All the arrangements and arrangements made by the forerunners have achieved unexpected results, which have taken a lot of extra time for the whole operation.

The front of the corpse group arrived near the roller skating square. The soldiers on the second defense line could clearly see the whole figure of the zombie in the front of the corpse group. They came out of the hail of bullets, almost all of them were in pieces. Some of the zombies were still burning black smoke, and some of them were no longer complete. However, they walked forward silently, and no one knew where their final destination was.

60000 corpses covered all the visible flat areas in the field of vision. Some zombies entered the building, and the corpses swarmed one after another. Some soldiers who have not experienced the battle of the first line of defense were stunned by such a scene. Everyone here has lost, but not all of them have fought so many zombies.

Xu Yongping and the officers seized the last time before the war and began to mobilize and inspire. After a short time of disorder, these soldiers recovered their previous confidence. Protecting their homes and protecting the country has gone deep into the bone marrow of each of them. Therefore, with a simple mobilization, their morale was restored.

"Taking the North Road of the National Stadium as the boundary, the zombie group approached within 20 meters. All the people opened fire, and the engineering team detonated the preset explosives." Xu Yongping looks at the zombies in front of him and gives an order.