Wang Hai heard the sound of the exit being blocked overhead, and he knew that the poison gas would be activated at the same time, so as soon as his feet landed, he took out the gas mask he was carrying and put it on his face.

"Ziz......" poison gas poured in from the exhaust vents in the ceiling.

Wang Hai looked forward, and every exhaust outlet was like a monster smoking as much as possible, desperately spitting out the poisonous gas in his body, and seemed to be still showing a smug laugh. The gas is filling up very quickly, and at this speed, it doesn't take a minute for everything to be filled with poison gas, and without a gas mask, no one will be able to escape this disaster.

The emergency device designed by Kelly had already activated two in a row, and the self-detonation equipment would explode in another ten minutes, and Wang Hai had to leave before then, so he couldn't waste time here, and got up and rushed forward.

Why did Wang Hai jump in at the moment when the exit was blocked, I am afraid that even he did not think about it, it was a completely instinctive reaction, he couldn't let Mary die here.

In the blink of an eye, the poisonous gas filled the entire corridor, although Wang Hai wore a gas mask and did not have to worry about being poisoned, but the yellow poisonous fog had a great impact on his vision, and the visibility was almost equal to zero. Unable to see the road in front of him clearly, Wang Hai could only grope forward with his senses, and his speed slowed down a lot.

With a "tom", Wang Hai was tied to the ground by a corpse on the ground, and just wanted to get up when he heard gunshots.

The gunfire came from the left, Wang Hai reached out and groped, he had come to the staircase, and the gunfire came from below.

Wang Hai guessed that Mary must have been fighting the enemy, and got up from the ground and rushed into the stairwell. Because there are no exhaust vents in the stairwell, there is relatively less toxic fog and visibility is improved.

A woman in a gas mask staggered up from below, her right arm wounded, blood running down her arm, and the pistol in her hand stained blood-red. She didn't notice Wang Hai at first, but when she found Wang Hai, she reacted quickly and raised the gun in her hand at an alarming speed.

Wang Hai stood on a high place, unable to crouch down to dodge the opponent's bullets, and he kicked out the moment the opponent raised his gun.

"Smack!" The muzzle of the gun was kicked out of the way, and the bullet hit the wall.

Wang Hai stepped forward and grabbed the opponent's wrist before the opponent fired the second shot, and shouted, "Mary, it's me!" ”

If it weren't for Mary's arm injury, Wang Hai would not have been able to kick the muzzle of the gun and grab her wrist before, but this also saved Wang Hai's life. Mary heard Wang Hai's voice, glanced back and said, "There is someone behind, let's hurry up!" ”

Wang Hai knew that Mary didn't know that the exit above had been sealed, and their only exit was below, and they had to go down. Wang Hai stood in front of Mary and said, "No, we have to go back." ”

"Go back?" Mary stared at Wang Hai, if it weren't for the gas mask, she would have seen her face very surprised.

"Yes, go back." Wang Hai replied, and then said, "I can't explain it to you now, but please believe my words, we can only get out of here alive if we go down!" ”

Mary nodded, I am afraid that even she herself did not know why she believed Wang Hai's words, a man who seemed younger than her and had sex twice after meeting a few times.

Wang Hai walked past Mary, intending to act as a striker, but was pulled by Mary at this moment. "What's wrong?" Wang Hai turned around and asked.

Mary let go of her hand a little embarrassed and said, "Be careful, the person below is Paul of the Black Tiger Mercenary Group, and he is a difficult guy." ”

Wang Hai now understands why Mary is here, the reason may be Paul, the two are snipers, and it is inevitable that they want to come out when they meet each other. In particular, Paul has always been angry about Mary taking the title of best sniper, and he will naturally pester Mary when he has such an opportunity.

Paul is a difficult opponent to deal with, not only because he is a good sniper, but also because of the gun in his hand. From the gunfire just now, it can be heard that Paul used a powerful fully automatic rifle, while Wang Hai and Mary only had pistols, which were much lower than Paul's rifles in terms of range and number of bullets. Fortunately, the poison gas helped Wang Hai and Mary a lot, and Paul also had his vision damaged because of the poison gas, which was why he didn't dare to catch up lightly, fearing that Mary would be ambushed here.

Wang Hai walked to the corner of the next floor and stopped, and asked Mary in a low voice, "Do you still have grenades?" ”

Mary took out a grenade from her body and handed it to Wang Hai, and asked at the same time, "He is not so easy to be blown up, do you have any better plans?" ”

Wang Hai poked his head out first and looked, the visibility was less than two meters, Paul must be hiding somewhere opposite, he couldn't see himself either. In such an environment, it is very considerate of a gunner's hearing and instantaneous judgment, that is, Wang Hai, Mary, and Paul, the three world's best snipers, can only judge where their enemy is by the sound of footsteps and the changes of a microsecond around them, and instantly shoot according to their own judgment, only in this way can they have a chance to kill the enemy.

Wang Hai glanced at the gun in Mary's hand with a grenade, and asked, "Are there any bullets?" ”

Mary unloaded the magazine and looked at it, there were still two bullets in it, so she nodded to Wang Hai.

Wang Hai smiled reassuringly, and then said, "Paul may not know that there are two people on our side, and I will find a way to lure him out later, and your task is to kill him." ”

Mary said worriedly, "No, it's too dangerous." You don't know Paul at all, he's definitely a sharpshooter, and he can still hit his target by feeling, even in a hostile environment like the one he has now. ”

Wang Hai said with a relaxed face: "This is exactly what I want to lure him out, I believe that in such an environment, you can also hit the target by feeling, right?" ”

Mary hesitated, she did believe that she was as capable as Paul, but she was not willing to let Wang Hai take the risk.

Seeing that Mary didn't speak, Wang Hai pulled down the grenade's ring of fire and threw it into the corridor, and after a few seconds, there was an explosion in the distance, and the poisonous mist was coiled and swirled like an evil dragon because of the air flow generated by the explosion. The grenade was not used to kill Paul, but to disturb his hearing, and Wang Hai rushed over after the explosion.

"Smack, smack!" The sound of the automatic rifle's gunfire came through the swirling poisonous mist, and Wang Hai fell to the ground in response.