I Just Want the Sword to Rule the Galaxy, but They Want to Fall into My Arms

Simple version: The world is in chaos, the mountains and rivers are broken, enemies from outside are coming, and only the setting sun and beacon smoke are left in the world. Chu Changge walked with his sword in hand, using his humble body to open his way to life with his sword. Detailed version: Fourteen years ago, warships from outer space arrived, and within a few months, the whole world was destroyed. Fourteen years later, Chu Changge walked alone with his sword. With his humble body, he tempered his sword in desperate situations and forged its edge in troubled times. The sword points at the setting sun, the sword cuts through the beacon smoke, the sword shatters illusions, the sword controls the mountains and rivers, the sword - will eventually cut to the sky!