The three of them immediately approached the open-air platform on the east side of the Secret Experiment Building. After they reached the bottom of the open-air platform, they crawled along the drainage pipe to the open-air platform.

The three of them climbed quickly and quickly. In just a few seconds, they arrived at the open air platform. There was a window on the open air platform, and the window was open and the window led directly to the corridor on the second floor.

Yang Feng quietly approached the window, and he quietly exposed his head and saw four security guards in the corridor with their backs facing Yang Feng.

Yang Feng quietly pulled out four flying knives, swung his hand, and four flying knives flew out, hitting the four security guards in the neck, and the four security guards fell down immediately.

Yang Feng quickly climbed through the window to the corridor, and then Xu Yuntian and Yan Xiaoyu followed him to the corridor. Xu Yuntian whispered to Yan Xiaoyu: "Xiaoyu, you are responsible for solving the four security guards on the left, and I am responsible for solving the four security guards on the right. In thirty seconds, let's act together."

Yan Xiaoyu nodded and said, "Okay."

The two of them counted the numbers silently in their hearts. After thirty strokes, they immediately followed the corridor to the corridor on the second floor, and they separated themselves.

Xu Yuntian flew out slanted. When he appeared in the corridor, the four security guards above saw Xu Yuntian. Before they could make a sound, Xu Yuntian's toothpick had penetrated their heads.

At the same time, Yan Xiaoyu rolled into the corridor. The four security guards guarding the detention room saw Yan Xiaoyu. "Are there..." As soon as a little sound came out, Yan Xiaoyu's crossbow arrow had shot through their throats.

Yang Feng found the key from a security guard and opened the iron door. There was a corridor about ten meters inside, and there were rows of detention rooms on both sides of the corridor.

"Li Liangchen, we are here to save you!" Xu Yuntian shouted.

After shouting twice, he heard one of the iron doors making a sound. Xu Yuntian hurried to the iron door, "Li Liangchen, is it you?" Xu Yuntian asked while opening the iron door.

The students in front of Xu Yuntian were several students wearing school uniforms. Li Liangchen was not seen. One of the girls cried and said to Yang Bufan: "Li Liangchen was taken away last night and has never come back."

Xu Yuntian was surprised, "What! Li Liangchen was taken away! Do you know where he was taken?" Xu Yuntian said nervously.

"He must have been taken to do the ** experiment. I don't know if he is still alive now." A boy frowned.

Xu Yuntian felt something was wrong. Unexpectedly, Li Liangchen was taken to do the ** experiment last night. It seems that he is in trouble.

"Uh! Li Liangchen was taken to do ** experiment!" Yan Xiaoyu said in surprise.

"Will Li Liangchen be finished?" Yang Feng said in surprise.

"Don't guess first. We went to the lab on the third floor. We couldn't tell if Li Liangchen's body was dead." Xu Yuntian said calmly.

Although he knew that Li Liangchen was in danger, Xu Yuntian still held a glimmer of luck and hoped that Li Liangchen would not die.

Xu Yuntian asked the students and employees of Tianyu Group to stay in the corridors on the second and third floors. He, Yan Xiaoyu and Yang Feng rushed directly to the corridor on the third floor.

There were twelve security guards in the corridor on the third floor. The three of them took action together, and the twelve security guards all fell down before they had time to resist.

When they opened the iron door of the secret laboratory, they appeared in front of them a corridor about 30 meters. There were more than a dozen security guards in the corridor. They saw Xu Yuntian, Yan Xiaoyu and Yang Feng, and looked surprised.

Xu Yuntian, Yan Xiaoyu and Yang Feng were also shocked. Unexpectedly, there were so many security guards in the secret laboratory. They immediately took action together, and in an instant, toothpicks, flying knives, and crossbow arrows flew out.

More than a dozen security guards fell down in an instant, but a security guard with a knife in his neck fell down and fired a shot and the bullet shot on the wall.

"Damn! I made a mistake, the flying knife was slightly tilted!" Yang Feng exclaimed.

"Yang Feng, what did you do? Now it's exposed! It must be because I have had too many things with Song Jiamin these days, and my flying knife skills are behind!" Yan Xiaoyu blamed.

"Uh! I'm sorry! I didn't fight with Song Jiamin at night by the river on the day I knew I had come." Yang Feng said in shame.

"Okay, Yang Feng, you and Xiaoyu hurry up and guard the second floor, and I'll leave it here to me!" Xu Yuntian said immediately.

As soon as the gunshots sounded, the security guards on the first floor must have known that something happened on the third floor, so they rushed to the third floor. There were students and employees of Tianyu Group in the corridor on the third floor. Therefore, they had to guard the second floor and not let the security guards on the first floor rush to the third floor.

Yan Xiaoyu and Yang Feng immediately went to the second floor to block the security guards. Xu Yuntian ran quickly along the corridor, while running, looking at the iron gates on both sides, looking for the ** laboratory.

At this moment, gunfire came from downstairs. Yan Xiaoyu and Yang Feng had already exchanged fire with the security guards. The people in the laboratory on the third floor were alarmed, and several staff members in white coats ran out of the laboratory.

"Oh! What happened?" a staff member said in surprise.

When he saw Xu Yuntian, he said in surprise: "You, who are you?"

Xu Yuntian arrived in front of the man, grabbed his throat and said coldly: "Where is the laboratory?"

The man was frightened and panicked: "That black iron door is the ** laboratory!"

Xu Yuntian shook his hand and the man flew out immediately, hitting the staff behind him. With a bang, the people were hit and flew out.

The black iron door was not far away. Xu Yuntian slid under his feet and instantly arrived at the black iron door. He found that the black iron door was closed and immediately took out the universal lock to open the black iron door.

A bloody smell came to my face. Xu Yuntian was secretly surprised and hurriedly shouted: "Li Liangchen!" He shouted and ran into the ** laboratory.

There are two houses in the ** laboratory, and the iron doors of the two houses are closed. Xu Yuntian saw through the glass window that there is an iron cage inside the ** laboratory.

"Li Liangchen!" Xu Yuntian shouted at the glass window.

The door of one of the ** laboratory opened, and a man in protective clothing walked out, looked at Xu Yuntian in surprise and said, "Who are you? Why did you come to the ** laboratory?"

Xu Yuntian flashed in front of the man in protective clothing, grabbed his neck, and said coldly: "Where is Li Liangchen?"

The man was shocked and wanted to struggle, but Xu Yuntian's hand was like an iron pliers. He could not move at all and almost suffocated.

"Who, who is..." The man couldn't speak.

Xu Yuntian realized that his hands were pinching too tightly, and relaxed his hands a little, and said coldly: "Where is Li Liangchen?"

The man in protective suit gasped heavily, took a few breaths, and hurriedly said, "Who is Li Liangchen?"

"It's the one who was caught by you to be a ** experiment student, tall and thin, with fair skin..." Xu Yuntian immediately described Li Liangchen's appearance.

The man in protective clothing immediately understood who Li Liangchen was and said in panic: "He, he is in an iron cage..."
Chapter completed!