On the top of the cloud mountain, Yang Xuan stood with his hands down and looked at the brightly lit Pinghai city under his feet.


    The mountain wind passes through the gap, the sea of clouds is surging, and the flat sea under the night is particularly quiet at this time.


    In this quiet prosperity, no one knows that a great disaster is coming.


    "General, Dr. Zhang Chengming is coming." Li Na appears behind Yang Xuan and gently puts on a coat for Yang Xuan.


    "What is he doing here at this time?" Yang Xuan asked.


    "It seems that there is a breakthrough in the research of triangular metal." Li Na thought and said.


    Yang Xuan was slightly stunned, and then a light appeared in his eyes.


    Before closing, he handed over the two immortal treasures to the Beijing Academy of Sciences for research. Unexpectedly, there was no news until now.


    "Let him come up." Yang Xuan nodded.


    Not long after Li Na left, Zhang Chengming jumped several times and climbed to the top of the mountain.


    Although the clouds are not high, the top of the mountain is steep. If it was put in the past, whether Zhang Chengming could climb up or not is still two things. But now, the physical quality of the whole mankind has made great progress. Zhang Chengming has also benefited from Yang Xuan''s genetic evolution solution and become like the previous Wulin experts.


    "Professor Yang is so elegant that when he comes back to the top, he can see all the small mountains. Standing here, he can have a panoramic view of the whole flat sea. He is really freehand." before people arrived, Zhang Chengming''s voice had been heard.


    Yang Xuanwei smiled, did not turn around and said, "president Zhang is a busy man. Why are you free to come to me today?"


    Zhang Chengming went to Yang Xuan and looked at the brightly lit Pinghai like him. He sighed and said, "with Professor Yang''s word, we can''t break our legs."


    Yang Xuan shook his head angrily: "I''m afraid you''re in pain and happy."


    Zhang Chengming laughed: "he who knows me is no better than Professor Yang."


    In fact, at the beginning, Zhang Chengming was still a little wary of Yang Xuan, but with the passage of time, he has regarded Yang Xuan as both a teacher and a friend. From his heart, he has an indescribable respect.


    After laughing, Zhang Chengming showed a dignified look on his face and said, "the things you gave us have a little eyebrows. You said these two things are very important to you. I dare not delay. I rushed over all night."


    Yang Xuan nodded and said, "thank you!"


    "Don''t be polite." Zhang Chengming shook his head and said, "we have invested a lot of manpower and material resources in these two things. In fact, we also benefit from your technology. Finally, we have a breakthrough."


    "Talk about it!" Yang Xuan nodded.


    "These two things are obviously from the hands of higher-level civilization. According to our research, we found that they contain forces we don''t understand. The magnitude and advanced of these forces once made us tremble." Zhang Chengming''s face was serious.


    "I know. From the beginning, I told you that this thing is a weapon, a weapon you can''t understand. The key is how to use it?" Yang xuandao.


    Zhang Chengming nodded: "after a lot of experiments, we finally found something. Among the two weapons, there is a very strange... Well, it may be a lock. Lock, you know, its power is locked and needs to be unlocked before it can be used."


    "Unlock?" Yang Xuan frowned: "how to unlock?"


    "This is also the focus of our research, which once put us in a dilemma. Only recently did we make a breakthrough," Zhang Chengming said.


    "Talk about it." Yang Xuan looked at him.


    Zhang Chengming took out the two immortal treasures of Yang Xuan from the small box in his hand. After solemnly handed them to Yang Xuan, he said: "the key to unlocking these two weapons is likely to be some gene or some established program. In other words, these two weapons are designed by people. Only its real owner can unlock them with his own gene or something else."


    Zhang Chengming tried to explain. It can be seen that he really worked hard.


    Yang Xuan frowned and said, "need to unlock? But I told you, there are actually six of these weapons. The other four are in Penglai world, and people there can use them."


    Zhang Chengming nodded and said, "we have also thought about this problem. Because there is no sample for research, we have made a bold hypothesis."


    "What?" Yang Xuan asked.


    "That is, we assume that this is a double lock. Under certain given conditions, its first lock will be opened and users can use some of its capabilities," Zhang Chengming said.


    Yang Xuan was lost in thought.


    Gene lock? Programmed? Established conditions?


    Zhang Chengming said with a bitter smile, "I can only help you here. We really can''t understand this kind of higher civilization thoroughly. Alas... Forget it, it can''t help you. I''ll go first. If there''s anything you can contact me, I promise to be on call."


    Yang Xuan didn''t seem to hear Zhang Chengming''s words and was still meditating.


    Zhang Chengming wanted to say something, but after he stopped talking, he finally turned into two words: "take care!"


    After talking, he turned and left.


    The mountain wind was blowing. It was late autumn at this time. The crooked neck tree on the top of the cloud and fog was blown by the wind. The dead leaves were like elves in the night. They kept flying around Yang Xuan''s body, and then fell to the ground. They stood still and became fertilizer for the big tree in the coming year.


    The so-called falling leaves return to their roots and return to their origin is probably the same.


    "General, let''s go back." Li Na gently took down the dead leaf on Yang Xuan''s shoulder and said.


    At this time, the night is deeper and there are dark clouds in the sky. Residual blood appeared and disappeared in the clouds, adding half a residual glow to the world, but making the lonely Yunwu Mountain more desolate.


    The dead leaves swept over his face. After a long silence, Yang Xuan gave a long sigh: "you said that the fallen leaves came from the tree and finally made fertilizer for the tree. What do you want in this life?"


    Li Na was slightly stunned. She looked at the dead leaves on the ground and hesitated: "I don''t know. Maybe they have no pursuit, that is, birth, growth, then falling and death, that''s all."


    Yang Xuan lost his smile, turned the topic and said, "by the way, I haven''t seen you mention your family. Where''s your family?"


    Li Na flashed a trace of sadness in her eyes and said, "general, like you, I have no family. I am also an orphan."


    Yang Xuan apologized, "I''m sorry."


    Li Na smiled and said, "it''s all right. It''s all right since it''s been so long."


    Yang Xuan thought and asked, "haven''t you found them?"


    Li Na smiled: "I found what I''ve looked for, but it''s just two solitary graves, not even a tombstone."


    Yang Xuan was indifferent.


    Unexpectedly, Li Na, who usually looks cold, has such a tragic past.


    Li Na stopped. After looking at Yang Xuan, she said, "in fact, we have investigated your life experience before, but it''s strange that no matter how we investigate, even digging three feet, we can''t find a trace of the general''s family."


    Yang Xuan smiled and said, "I was born on a thunderstorm night and was saved by the old Dean. If there was no old Dean, I might have died. The old Dean took the name Yang Fan for me... Hmm? Wait..."


    Just at this point, Yang Xuan was suddenly stunned, and a thunderbolt exploded in his mind.


    Yang Fan!!?