Global martial arts: invincibility starts from simplifying exercises

The alien space invaded, the animals and plants of the blue star evolved wildly, and the human beings fell from the top of the pyramid, so they could only stick to the big cities and dare not go out of the city at will.
350 years after the disaster, Huang Xiaotian, who was just an ordinary high school student, suddenly awakened to the simplified system of exercises.
[The fifth set of breathing exercises in the country is being simplified... Simplified successfully! 】
[The Fifth National Breathing Technique→Breathe! 】
[Xiao Li Feitian is simplifying... The simplification is successful! 】
[Little Li Flying Knife → Wrist swing! 】
[Iron cloth shirt is being simplified...simplified successfully! 】
[Iron cloth shirt → touch yourself! 】
"..."
Since then, Huang Xiaotian has climbed to the top step by step in this troubled world, becoming an invincible figure in the world!