To Live Forever for Thousands of Years, I Will Start from Da Qian

My name is Xu Pingan, a time traveler with a system. But it disappeared just after crossing the system, and only gave me an immortal body. Over the past thousands of years, I have experienced life with different identities. I have been a bandit and a soldier. When he was a teacher, he taught a few students and casually helped them change the government affairs. As a result, he accidentally created a prosperous age. There are legends about me circulating in the world, but there is no trace of me in the history books. This is just right, and you will be at ease. Until that day, the newly enthroned young emperor stared at him and asked in the empty hall: "National Master, why do I... Still remember you?"