The Path of Man and Devil

I am a martial artist, not seeking immortality, just living. However, in this world, you can't help yourself. It's easy to die but difficult to live. In this case, anyone who blocks my way to survive will be killed without mercy. (Note: This is a slow-burning book. The protagonist's character will change from young and ignorant to mature and mature. I'm afraid it won't be to everyone's taste if you like fast-paced and refreshing writing.)