As Long as I Keep Doing Good Deeds, I'll Be Invincible

(System + Invincible + City + Cool Articles + Slap in the Face) Poor migrant workers are forced by the system to become saints. From then on, they must uphold justice for heaven, punish evil and promote good, and maintain world peace. Is he the master of traditional Chinese medicine who can rejuvenate his body? Or a peerless warrior king who kills people like crazy? Is he a martial arts master who shocked the world? Or the flower protector wandering among the flowers? Let's start our story, hope you all like it...