After 10 Years of Fantasy, I Am Invincible

My name is Chu Ge, and I am a good young man in the 21st century. I have experienced the legendary time-travel. I have traveled to a different world, where martial arts are respected and the strong can fly to the sky and escape. Knowing this, I am extremely scared. Fortunately, I got the system, so I wanted to fight for eighteen hundred years. What I didn't expect was that after 10 years of fighting, I became invincible. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.