I Live in a Unit Drama

He has traveled through many worlds and seen many different lights. Every time, he could see something that others couldn't see - a light blue light group breathing and growing on a few people. Those people lead the times and are called "protagonists." Later he discovered that the light was not just on them. Those who farm, weave, blacksmith, and study, all of them have light. Same color, same brightness, same breath. He is not the protagonist. He's just the guy who wields the knife. Kill monsters with one sword, protect the people with one sword, and end injustice with one sword. From one world to another, from one person to millions of people. He didn't know what was at the end of the light group, or how many times he would have to travel through it. He only knows—— As long as someone shines, he will keep going. --- [The story of Zhao Xun, the time traveler, moving forward with a sword in different eras. [Here there are urban chases, demon swords to slay demons, an industrial revolution, and an ocean of people. [But ultimately, this is a story about light. --- "Cut all the injustice with one sword, and in exchange the world will be clean for a few days." "Don't ask where your return date will be, this place of peace of mind is my hometown." A soul from the earth, an inexplicable world, a magical story, a lonely person's journey, my name is Zhao Xun, I am just a traveler. The introduction is weak, so move on to the main text. (No heroine, unlimited flow, upgrade flow, no system, becoming a god, all chapters are about 4,000 words long)