Gu Yang traveled to the fantasy world and obtained a modified production date system. Since then, Gu Yang has embarked on the road of unrestricted modification. 【After you revise your cultivation base to hundreds of millions of years, you will break through the limit of the immortal emperor and reach the realm of the eternal Taoist ancestor! 】 【After you modified the exercise method to hundreds of millions of years, you successfully comprehended the Supreme Sword Sutra, reversibly cut time and space, and destiny. 】 【You modified the bloodline of the pet white fox to hundreds of millions of years, and successfully awakened the bloodline of the ancient nine-tailed fox! 】