Fantasy: I Will Upgrade the Mainland

Tang Yu traveled through time, and he also wanted to defy the sky and the earth like so many time travellers. What? A world of low martial arts? Can't practice? Tang Yu said it was so bad! "Ding! The upgrade to the mainland system is completed." Upgrading the mainland system: The host needs to upgrade the current low martial arts world step by step to a high martial arts world, or even a fantasy world. The strength of the host is closely related to the strength of the entire interface. Tang Yu:? ? ? What? This means... If I want to practice, I have to bring the entire interface with me? Why the hell do I have to upgrade mainland China? There is no justice! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.