The Road Is Eternal, I, Chen Changsheng, Can Level the Sea with One Sword

The great road is like the blue sky. My road cannot come out alone. I, Chen Changsheng, transform all the roads into a sword. When the sword rises, it can cut off the sea. His surname is Chen and his given name is Changsheng. He is a native of Yuncheng. His only hobbies are showing off, killing people, and playing swordsmanship. Traveling through the fantasy world for fifty years, he has been granted the title of prince and prime minister, and has become as wealthy as the enemy. His name is the assassin organization Shura, which changes people's minds. Traveling through another world for fifty years, awakening the system, getting stuck on the first mission, giving the continent's strongest man a slap in the face. This sour taste is comparable to winning the lottery. What! My brother is the strongest on the planet. Isn't it easy to trample to death a little sect's holy son? The ancestor of the sect is coming to take revenge? Are the demons going to invade again? Give me your brother's name. Wait, my system seems to be called the Doomsday System? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.