Global Martial Arts Master: I Started by Mopping the Floor in the Martial Arts Hall

[Newbies] [System] [Multiple heroines] He practiced martial arts at the age of eighteen and mopped the floor at the age of nineteen. Lin Mo traveled to a world where everyone practiced martial arts. His parents were car repairmen and supermarket cashiers. He was not even a first-class martial artist, so he could only work as a handyman in a martial arts studio and was looked down upon. Until the system comes - being scolded is rewarded, the progress is improved by wiping the floor, and you have to endure it for three months, and the skin tempering is about to be completed. He has a playful and smiling face on the outside, but in his heart he is murderous and decisive. When he needs to pretend to be coward, he looks more like anyone else, and when he needs to take action, he is more ruthless than anyone else. A pair of eyes is even more vicious, able to see through the hidden wounds in other people's bodies, flaws in martial arts, and the direction of blood. The master of the martial arts hall, Zhou Xiong, was at the peak of the fifth rank and the strongest man in Jiangcheng who had come back alive from the underground world three times. He had a hidden injury in his body that penetrated into the kidney meridian without even realizing it. His son Zhou Tianlei, a genius who reached the third level at the age of twenty, had a hidden injury in his body, waiting to be unleashed. Lin Mo originally wanted to make a fortune quietly, mopping floors, collecting rewards, and helping the owner of the gym to see the doctor. But the cracks in the underground world are expanding, monsters roar outside the city, and the war between underground people and humans never stops. There are some things that he can't hide from if he wants to.