I Guard the City Gate and Will Live Forever

[Longevity + Systemless + Cool Writing + Fantasy] Gu Changsheng gloriously became an ancient city gate security guard. Fishing was his goal, making money was the right way, for himself and for the sake of martial arts! Over the long years, he has overlooked the prosperity of the world and the ups and downs of countless famous families. He has seen the glory when they entered the family, the prosperity of Chang'an, and also seen their families destroyed and exiled thousands of miles away. Change is the trace of time, what remains unchanged is the years of eternal life. He endured his enemies to death and even turned them into friends. At the end of his life, he was the only one who looked at all sentient beings with a smile and became an omniscient and invincible being!