Heavenly Master Eliminates Demons, My System Is Shut Down at the Beginning

As a fat man, Chu Xiu never thought that he would travel through time. What's more, I didn't expect that I would actually travel to a world where ghosts invaded the world, and people relied on mobile apps to slay demons with heavenly masters to survive. I'm happy that I was possessed by the system at the beginning. I thought I would become better than others, but I didn't expect that the system turned off the mission requirements. How could I embark on the path of becoming better than others and save the world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.