"Among these mutated creatures now, only Yu Kai and this Niuniu have retained their intelligence and are not bloodthirsty and killing innocent people! And they have mastered this power." Academician Fang frowned and spoke slowly, with a hint of worry in his tone.

"The military now wants us to contact Yu Kai and ask him to come back to assist the Gene Research Institute in developing a vaccine that preserves intelligence!" Academician Chao Tian's face was solemn, and his voice was low and serious.

"The idea of ​​the Genetic Research Institute is good, but they are afraid that Yu Kai will not want to come back. Look, he is just thinking about becoming stronger now, how could he miss such a good opportunity!" Old Chen walked over slowly with the teacup, his face full of worry, and his steps seemed a little heavy.

"The military means to give us three days, otherwise they will use missiles to force him out!" Academician Fang continued, obviously very conflicted.

"We can't notify him either? Do we have to go in?" Old Chen frowned and spoke with a tone full of dissatisfaction.

"The military said that they can still control some broadcasting systems and broadcast. They hope that Lao Fang and I can use the radio to notify Yu Kai!" Old Chao spoke in a deep voice, his eyes revealing a hint of determination, but he could not hide the anxiety in his eyes.

"What should we do?" Old Chen looked at the two of them, holding the teacup tightly.

"We have no choice but to do this for the sake of national justice. I heard that people who die of natural causes will also mutate, and the living space for humans is getting smaller and smaller. Maybe we will all mutate after death and endanger the world!" Old Chao stared at the screen, watching Yu Kai and Niu Niu fly towards a city.

Yu Kai and Niuniu slowly descended upon Tianyang City. Along the way, they encountered powerful mutants, each one slain by Yu Kai's fierce attacks. He and Niuniu now enjoyed a harmonious relationship. He bravely hunted the mutants, while Niuniu swiftly collected the mutant beads, sharing them equally afterward. Their strength had significantly improved, and Yu Kai roughly estimated that he had reached the Grandmaster level. Niuniu, on the other hand, hadn't seen any significant improvement in her combat prowess, primarily excelling in speed. Now, Niuniu was lightning-fast, making it nearly impossible for Yu Kai to catch up with her, even with his wings flapping vigorously. Of course, she also had a hidden ability that Yu Kai hadn't shared with him.

The entire Tianyang City was in ruins, with broken cars and collapsed houses everywhere, and a dead silence. The whole city was eerily quiet. A gust of wind blew, sweeping up a sky full of plastic garbage, which flew wildly in the air. Yu Kai walked carefully into a dilapidated supermarket, rummaged around inside, and finally found some food and water. He hadn't eaten anything properly in the past few days, relying on his spiritual power to get by. He handed a piece of bread and a bottle of drink to Niu Niu, who took it, took a small bite, tasted it, and spit it out, saying with disgust: "What is this? It's too disgusting!"

"Ah! You really don't need to eat?" Yu Kai looked at her with wide eyes.

"I'm not hungry, it's too disgusting!" Niu Niu handed the food back to him and curled her lips.

"Then what do you like?" Yu Kai asked casually while biting bread and gulping water.

"Blood, your blood!" Niu Niu stared at Yu Kai's neck with a greedy look on her face.

"Don't mess around!" Yu Kai was so scared that he quickly took a few steps back with an exaggerated expression of fear on his face.

"You are pretending too much! Besides, I can't bear to bite you!" After Niu Niu said this, her expression suddenly became alert and she looked outside with sharp eyes.

Yu Kai stuffed two bites of bread into his mouth and nearly choked. He quickly took a few gulps of mineral water. Then, Yu Kai gripped the long sword beside him and walked out with a serious expression.

"Tram! Tram!" Heavy footsteps echoed from afar. Yu Kai looked in the direction of the sound and saw a massive chimpanzee approaching like a mountain. Its massive body shook the ground with every step, and it even toppled a building with ease, sending clouds of dust and smoke billowing into the air.

Yu Kai and Niu Niu looked at the huge monster and felt nervous. "You get out of the way first! I'll go meet him!" Yu Kai took a deep breath, took a step forward, and spoke in a firm voice.

"Can you do it? He's so big!" Niu Niu's face was full of worry.

"Don't worry, it's just big. I can do it too. Just stand away and don't get hurt by us." Yu Kai comforted, his eyes fixed on the gorilla.

"Crack!" Pieces of metal armor snapped together, tightly encasing Yu Kai's entire body in the heavy armor. He stepped forward, steady and powerful, his body expanding with each step. Soon, a massive armor towered over the city, like a giant of steel.

"Roar!" The giant chimpanzee roared furiously, deafening everyone. It grabbed two cars from the ground and hurled them towards Yu Kai. The cars whizzed through the air with a tremendous impact.

Facing the oncoming car, Yu Kai showed no fear. He swung his mechanical fists, "Bang! Bang!" Two punches unleashed like cannonballs, sending the car careening through the air and crashing into the distance. With a swift run-up, his legs unleashed a powerful burst of force, launching him into the air and slamming his iron fists down hard at the chimpanzee.

The mutant gorilla roared with a roar, and leaped up directly. With its strong arms, it hugged Yu Kai who was flying towards it. With a loud "bang", both of them fell to the ground. The whole city shook violently, as if a small earthquake had occurred. The two sides hugged each other and wrestled with each other in an instant.

Yu Kai rode on top of the chimpanzee, his arms unleashing a flurry of punches. The chimpanzee fought back, crossing his arms over his head. Then he kicked Yu Kai over and pounced on him with his massive body, trying to pin him down.

Yu Kai's mecha transformed rapidly, and long, sharp spikes instantly grew out of his mecha, pricking the chimpanzee in pain. The chimpanzee hurriedly stood up and distanced itself from it.

The chimpanzee was furious. It pulled up a nearby building and threw it at Yu Kai, who had risen. Yu Kai was agile and quickly dodged it. He rushed forward and punched the chimpanzee in the jaw, causing the chimpanzee to stagger. The building crashed directly into the ground with a loud bang, scattering debris everywhere.

Yu Kai attacked quickly, his fists whistling as he threw punch after punch, forcing the chimpanzee to retreat continuously, leaving deep footprints on the ground with every step.

"Roar!" Another deafening roar echoed, the sound waves surging through the air, threatening to shatter the very atmosphere around it. From afar, a second, even larger chimpanzee scurried towards them like a cannonball, stirring up a gust of wind. The powerful force of the wind blew the debris in its path everywhere, and the dust on the ground instantly rose, obscuring the sky and the sun, exacerbating the already tense situation.