He transmigrates into the dangerous world of Perfect World.
The good news: he has a golden finger that lets him transmigrate across the Myriad Worlds.
The bad news: his golden finger smashes his head during transmigration, scrambling his memories. He believes he comes from the Heavens Above and, while explaining its cultivation system to Shi Hao, mixes in the systems from the fanfiction he has read. Shi Hao takes it all as fact and starts cultivating this fictional system.
When Gao Wujie regains his memories and sees that Shi Hao has actually cultivated the fictional system into reality, he can only twitch his mouth in disbelief. But when he feels the immense power within his own body, he is delighted.
And so, Gao Wujie leads Shi Hao and the world of Perfect World further and further astray.
When Shi Hao finally reaches the Heavens Above, he discovers that Luotianxian and Menghai, the figures Gao Wujie had talked about, are nothing special after all. They are no match for him. Everything Gao Wujie had said about the Heavens Above was a lie.
Shi Hao can only let out a long sigh before punching the Ten Strange Ancestors to pieces, trampling the Strange Plateau, and becoming invincible across the Myriad Worlds.
First world: Dragon Island of World of Immortality
Second world: Legend of the Son of Heaven, Tomb of the Gods