Immortal Cultivators Surrender Quickly

Facing the overwhelming army of cultivators in front of him, a conversion formula automatically appeared in Liu Han's mind: Ten bullets are needed in the Qi training stage, a hundred bullets are needed in the foundation building stage, airplanes are needed in the Golden Core stage, and it's even more troublesome in the Nascent Soul stage, without dozens of airplanes... Wait, why is there still a Mahayana stage? It seems that it will be impossible without a nuclear bomb. Haha, it's time for these immortal cultivators to taste the power of technology. Ps: This is a story about mortals developing technology in the world of cultivating immortals and using technology to crush cultivators.