Start by Cultivating Immortals and Click on the Technology Tree

In an accident, an ancestral soul stone took Zhu Tianyu to a world civilization where immortals were cultivated. And he also became a second-generation immortal. He originally thought he could live a happy life, but he found that the human race in this world didn't seem to be doing well. So he started a human race's scientific cultivation of immortality. Have you ever seen immortal cultivators fight like an army? Have you ever seen a cultivator operating a mecha? Have you ever seen immortal cultivators using the Immortal Land as a spaceship? They're all available here.