Interstellar Undercover, My Spiritual Roots Will Grow

Advanced civilization aliens suddenly came to Blue Star, saying that they would take Blue Star into the future, but the prerequisite was to test whether humans have spiritual roots. Those with spiritual roots will be sent to a cultivation civilization to work as undercover agents. When higher civilization and cultivation civilization go to war, just jump out and rebel. The protagonist Song Zhi is one of the lucky and unlucky chosen ones. But for some reason, Song Zhi's spiritual roots of cultivating immortals actually grew automatically.