This System Defies Heaven, I Am Invincible! You Won't Say?

[Pretending to be a pig and eating a tiger + Dihua + contrast + fantasy imagination + weak system] Lin Fan traveled through time for twenty years, and his whole life was ruined by the garbage system. He had no hope of practicing and could only be a small mortal. Little did he know that what the system taught him was already the pinnacle of this world. A pill he concocts at random, a pot of tea he brews at random, and a set of radio gymnastics he performs at random can make a peerless strong man break through the barrier. The system taught him many things, such as: washing and cooking, broadcasting and gymnastics, music, chess, calligraphy and painting, refining medicine and weapons... But it did not teach him to cultivate immortality. Lin Fan always thought that he was just an ordinary mortal... "No, why do you keep calling me senior! Do I look old?" ...