Chen Yu: Born in an ordinary farmer's family in the late Qin Dynasty. At that time, the Qin Dynasty was tyrannical and the people suffered terribly due to war and heavy labor. Chen Yu's parents also died as a result. In order to avoid the war, he mistakenly entered an ancient Taoist temple in a mysterious valley. By chance, he touched a mysterious jade stone engraved with strange patterns, thus gaining the ability to live forever. His body has been fixed at around 30 years old ever since. Over the long years, his kind and persevering nature has not changed. With his rich experience, he has accumulated a vast amount of knowledge, and has been deeply involved in many fields such as history, culture, science, and art. Because of his immortality, he has witnessed countless joys and sorrows. He has compassion and responsibility for the world. With his unique perspective and ability, he has left his own mark in the long river of history.