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The outside world's civilization of cultivating immortals invaded. The people of Xuanyuan Continent were unable to resist due to the decline of the civilization of cultivating immortals. They could only live in an alien space. After finding a way out, they were unexpectedly invaded again by an alien civilization. Three teenagers accidentally fell into a time and space tunnel and traveled to 1,000 years ago to learn the secrets of cultivating immortals. After they returned to the future to resist the aliens, they embarked on the road to cultivating immortals...