Seeing that the windows of the real room were destroyed, Wei Chao immediately opened the heavy door of the real room in the center of the third floor to ensure that the safe was in the sight of the commandos at any time, so that it could be protected at any time when there was a situation in the room.

Subsequently, he reported to Li Dongsheng about the situation in the room. In fact, Li Dongsheng had already seen the situation in the real room from the surveillance screen, and he ordered Zhang Wa: "You retreat outside the gate to monitor, and the door of the real room does not need to be closed to prevent the enemy from attacking again."

The enemy suddenly went silent after firing a rocket attack. Wan Lin slid along the rope upstairs to the window of the real yàn room on the third floor, and whispered to Zhang Wa to arrive at the real yàn room to avoid causing a misunderstanding. I took a look at the real yàn room and downstairs, and found nothing abnormal, so I threw Xiaohua into the real yàn room, and continued to slide to the ground on the first floor.

At this time, all the people guarding the research institute were wondering why the little devil attacked the gate and the third-floor window in a row, and suddenly there was no movement.

Wan Lin slid to the ground and squatted down, adjusted his breathing, put his ear to the staircase wall and listened carefully for a while, and vaguely felt that there seemed to be some noise on the second floor of the building.

He hurriedly ran into the building, waved his hand to several security guards on the first floor, and quietly approached the second floor with his gun alone against the staircase wall. Going up to the stairwell on the second floor, he raised his gun and looked around, and suddenly found the soldiers of the two guard platoons in the stairwell sitting on the ground with their backs against the wall, their heads hanging down on their chests.

"Oh no, the little devil has already come in!" Wan Lin secretly screamed in his heart, but he didn't dare to make a sound, quietly put the sniper rifle behind him, pulled out the pistol from his leg, felt the corner of the stairwell and pricked up his ears, and listened to the movement in the corridor on the second floor.

The corridor on the second floor was quiet, Wan Lin turned around and touched the neck artery of the soldier sitting on the ground, and found that the two soldiers had broken their necks by force. "Good professional method of killing". Wan Lin screamed angrily in his heart

"Leopard head, the enemy has entered the second floor. Two soldiers died, and the enemy's entry channel was not clear", Wan Lin reported the situation in a low voice, and suddenly rolled into the corridor on the second floor, raised his pistol and looked around the quiet corridor.

Wan Lin wondered: "The outside of the building and the first floor are heavily guarded, where did the little devil come from?" He cautiously walked down the hallway to the end, and suddenly noticed that a piece of the ceiling at the top of the hallway had been moved.

Wan Lin leaned against the wall of the corridor, slowly removed the sniper rifle from his back and stabbed the ceiling upward, and the ceiling slowly slid to the side, revealing a central air-conditioning vent above the ceiling.

"Damn, the little devil came in from here, probably from the basement ventilation pipe", Wan Lin quickly informed Li Dongsheng of the situation, and then quickly went up the stairs to the third floor.

Li Dongsheng received Wan Lin's report and immediately told the research that the director of security had asked for an air-conditioning duct diagram. He looked closely and saw that the air-conditioning ducts were coming up from the basement and spread all over the floor.

The pipe has a right-angled bend in the second-story corridor, and the pipe suddenly becomes thinner, making it impossible to climb over a person. It is estimated that the enemy came down from the ventilation pipe on the second floor, and suddenly found two soldiers of the guard company, so he quietly killed the two soldiers, and then bypassed the narrow air duct position, drilled into the ventilation duct from the front, and really ran to the third floor.

Li Dongsheng immediately informed Wei Chao and Wang Hong to be vigilant. At this time, Wei Chao and Wang Hong knelt on one knee on the ground of the third-floor corridor, and the muzzle of the gun was pointed at the ceiling at the top of the corridor; Zhang Wa was still holding a gun at the broken window in the center's room, while Lingling was holding an automatic rifle at the elevator entrance and the entrance of the corridor.

Xiaohua, who was thrown into the center room by Wan Lin, was wandering around on the center room, seemingly a little irritable, constantly looking up at the ceiling and smelling something, and her ears were quickly stirring back and forth.

At this time, Wan Lin quietly appeared in the corridor on the third floor with a pistol, he waved his hand lightly at several comrades-in-arms, and walked into the real room with a gun. Xiaohua glanced back at Wan Lin, suddenly stood up on the real platform, her two eyes glowed blue, tilted her head to listen to the movement above, her two hind legs kicked the test bench, her body jumped up in the air, and the ceiling was knocked out of a big hole with a "bang", and her two front paws swung up violently.

"Ah" A miserable scream suddenly sounded from above the ceiling of the real yàn room, and then he heard a violent crawling sound above the ceiling, Wan Lin raised his pistol and fired two shots at the sound of moving forward quickly.

The sound of crawling immediately stopped, and a large expanse of blood immediately oozed from the ceiling. Zhang Wa and Lingling had already rushed into the house, Zhang Wa ignored the movement on the ceiling, ran directly to the broken window, and raised her gun to the window.

Lingling knelt on one knee beside the test bench, her gun aimed at the window. When Wei Chao and Wang Hong heard the gunshots, they had already rushed to the door of the real room, holding guns at the corridors on both sides. The tactics of several people worked together seamlessly, blocking all possible directions of the enemy.

Hearing that there was no movement on the ceiling, Wan Lin whispered to Xiaohua, "Up!" Hearing the sound, Xiaohua rushed into the big hole in the ceiling that she had just knocked open, "......" With the rapid movement of Xiaohua in the ceiling, the sharp claws directly cut a crack several meters long between the ceiling and the ventilation duct.

"Bang dang", a black shadow rolled down from the crack in the ceiling, face down and landed directly on the real platform in front of Wan Lin, and then a pistol also fell, and the ceiling was opened by the rolling black shadow A long big crack.

Wan Lin pressed the opponent's neck in the past, and found that the opponent's neck artery had stopped beating, and there was a long wound on the thigh under the buttocks, which was deep to the bone, and the flesh was turning over and bleeding out, obviously injured by Xiaohua's sharp front claws.

Wan Lin turned it over with his hand, only to see that the other party's eyes were open, and there were two small holes in his chest, and a blood stain.

After a while, Xiaohua also jumped down from the ceiling and shook her head at Wan Lin. Wan Lin understood that there were no more enemies in the pipes on the ceiling, and Xiaohua had already reconnoitred.

Wan Lin waved at Xiaohua and walked towards the outside of the real yàn room, just in time to meet Li Dongsheng who was running, "Leopard head, I'll take a look outside" Wan Lin said hello and ran out with Xiaohua.

Wan Lin had been worried about the black shadow that disappeared after slamming open the door. The enemy clearly attacked the institute with a premeditated attack. One drove into the gate to attract attention, one took the opportunity to sneak into the ventilation duct of the real yàn building, and the other bombarded the window of the real yàn room on the third floor, and then carried out long-range sniper cover. So far, two people have been eliminated, but where is the other one?

Wan Lin took Xiaohua and just walked to the second floor, and Li Dongsheng's instructions sounded in the earphones: "Wan Lin, a large amount of plastic explosives were found in the backpack of the devil in the real room, be careful!" ”