Utopian Martial God

In this era, muscular martial arts and guns and airplanes roar together. There are martial arts masters who split mountains and rivers, stir up the wind and clouds with the wave of their sleeves, and are said to be invincible in the world. There is a mechanic who has unparalleled marksmanship. He can kill a god with one shot from a thousand miles and destroy an entire country with one shot. The world is gradually declining, firearms are gradually rising, and the supernatural and mysterious are gradually emerging, as well as a frail and paralyzed young man. This is not a world of one person, but an era of a group of people.