My Cultivation Companion Helps Me Achieve Immortality

Yu Xian transmigrated into a world of cultivating immortals. Despite reaching middle age, his cultivation remained low, so he chose to give up and enjoy life. Then, he was recruited by a royal mansion as a tribute. Little did he know that his cheat system would arrive, and his legend started from being a tribute in the mansion...
As time passed by, Yu Xian experienced countless adventures. When he looked back, he realized that he had become an existence of eternal life in the mortal realm.