Early landing in the world of martial arts

Gu Changan, who died because of saving others, woke up and found that he had been reborn through time travel.
And he also transmigrated into a game that could affect reality, becoming a farmer living at the bottom.
In the world of martial arts, demons are rampant, and there are players who will come in a year, the safety of the farmer npc cannot be guaranteed at all.
Fortunately, he has a player template, and he can add some skills to integrate it.
Gu Changan started as a farmer at the bottom of the game, practicing martial arts to kill demons, gaining experience fusion skills...
When the game starts and the players arrive, Gu Changan has already become the big boss in the game. When the players start to develop, he has already become the supreme martial artist!
When the game and reality are connected, and when the myriad worlds descend, Gu Chang'an takes a step forward——
next moment!
The whole world surrenders at his feet! ...