Don't look at the size of the cliff lizard, which is no more than a meter in size, by the middle and late Cretaceous period, it was this ancient creature that evolved into a giant paleontology that could reach a size of up to 30 meters: the Canglong.

Extracting guidance hormones from living Cretaceous organisms can be done in some more direct ways, but extracting them from fossils, due to the long time of biopetrification, the preservation of this hormone will be very incomplete, and it is necessary to use other biological fossils of the same period as supplementary activation.

Yiyun knew a little about Cretaceous cliff lizards, cangsaurus, tyrannosaurus, pterosaurs, duck-billed dragons, etc., because after the Cretaceous genes were unlocked, these creatures all mutated in the form of mutant beasts, and some other non-aggressive Cretaceous creatures, he knew very little, so he asked Xue Xue for help.

According to this condensation time, you need to stay here for at least forty days. Yiyun stared at the mechanical watch and calculated, and at the same time, the whole person relaxed a little.

Back here, the two most urgent problems are: first, to obtain "gene inhibitory enzymes" to turn oneself into transgenic gene evolution, which is done, and second, to extract the guide hormones and unlock the genes in one's body in the direction of Canglong, which is ongoing.

Only by solving these two problems can I make myself do other things.

The end of the Cretaceous period has come, and the Cretaceous genes in his body are only 1% unlocked, and the biological energy he has is just 100 joules, not to mention encountering mutant beasts, even those chalk corpses wandering around the campus at this time, once more than ten appear at the same time, it will be difficult for them to deal with.

Now, all we have to do is wait.

"Thank you for your help. Yiyun looked at Xue Xue, he felt very strange: at the most critical moment of the end of the world, it was this girl who saved herself and let herself return as a tinder;

"You're welcome, I should thank you. "Because there are still Pan Lan and Chen Shasha in the showroom. Xue Xue consciously kept Yiyun's secret, and did not say anything that Yiyun reminded her of her. Xue Xue's way of dealing with it made Yiyun feel more at ease with her, while Pan Lan on the side was still puzzled. But I still think that Xue Xue thanked Yiyun because he killed ** just now, closed the iron door, and let them get out of trouble.

"It's hard to explain what I'm doing now to you, but don't worry. I will pay you for all your help. Yiyun didn't mean to explain to Xue Xue, but his tone was much more relaxed than just now.

Feeling the change in Yiyun's tone, Xue Xue said apologetically, "I...... I'm going to bring these classmates here, and I'm really sorry about this......"

Yiyun waved his hand: "You don't have to say sorry to me, I believe you also saw the terrible thing about people just now, it doesn't matter who you bring here." His tone became cold: "However, be prepared to deal with the people you brought." ”

Take care of the preparations you bring with you...... Xue Xue couldn't help but look at the green trash can by the wall, one of her legs still crossed by the bucket. She shuddered, looking at Pan Lan and Chen Shasha, who couldn't stop sobbing, was she still ready to kill them?

With this thought in her heart, Xue Xue quickly shook her head, and then said to Yiyun in a kind tone as much as possible: "Well, both of them are roommates who are very close to me, let me introduce you to you." ”

Yiyun is not a genetic evolutionary, his life in the last ten years was very miserable, and it was not until he met Xue Xue later that he was able to improve. Therefore, he behaves very coldly in the relationship between people.

"Yes. Yiyun agreed, and sat directly on the ground, resting against a pillar to recover his strength. Not only did he not solemnly tidy up his messy clothes like a normal boy would when he saw a beautiful woman, but he was not even ready to stand and get to know the two girls.

"Call them here. Yiyun's attitude was that getting to know those two girls was completely a trivial matter when he was resting and recovering his strength.

As soon as Xue Xue spoke, Pan Lan, who was already not far away, quickly walked over. But Chen Shasha was still squatting there and sobbing, Xue Xue shouted a few times, but she didn't get up. Xue Xue had no choice but to walk over, she reached out and pushed Chen Shasha.

"Don't cut off my head! Don't cut off my head......!"

Chen Shasha woke up and screamed a few times, this rich girl was sobbing and squatting there and falling asleep just now......

This made Xue Xue speechless for a while.

"What an idiot!" Pan Lan glanced at Chen Shasha with disgust.

The three girls walked up to Yiyun, except for Xue Xue, the other two had fear on their faces.

"He is Yiyun, a friend of mine, I came to the showroom to get a sample of paleontological fossils, and I told him in advance, and such a big change happened later, but fortunately he found it here. Xue Xue typed the draft several times in her heart, and barely found an excuse for Yiyun to appear here.

"Oh, you're so good just now, but, but you've killed someone...... This is a crime......" Chen Shasha muttered in fear, glanced at Yiyun tentatively, and quickly dodged, she couldn't believe that she was so close to a murderer.

"What do you mean by murder? You stupid, if he hadn't killed **, we would have fallen into the hands of ** perverted perverted wolf, and we don't know how he would have changed his tricks...... Oh...... Anyway, it's good that he killed that scumbag. Pan Lan's face flushed slightly, she had more life experience than Xue Xue and Pan Lan, and she saw the opportunity very quickly.

Although she was a little disgusted by Yiyun's indifference and contempt in her heart, after weighing it, in this situation, Yiyun could only please and definitely not offend.

Yiyun looked at the three girls in front of him.

Xue Xue was wearing a lean pale yellow striped sportswear, which she changed into after listening to Yiyun's warning, a close-fitting suit, outlining her excellent curved figure, and her long hair was simply tied in a ponytail at the back of her head.

Chen Shasha was wearing a pink dress, a big bow was decorated on her round chest, this girl had very white skin, a slightly chubby figure, her wheat-dyed hair was fluffy into small curls, and her two long white legs trembling slightly were splashed with blood stains.

Pan Lan's upper body is an off-the-shoulder white gauze shirt, and the two huge lumps inside are wrapped in a black bra, looming and ready to come out; the extremely short hot pants on the lower body cover the tall beautiful buttocks, and the two beautiful legs are very slender. (To be continued.) )