Immortality: Starting from Rescuing Zhu Yuluo

In 2030, as a test subject in the human AI era, Lin Tianzheng was injected with the "immortality-like" gene and traveled back to the origin of Chinese civilization: the Three Sovereigns and Five Emperors period; His mission is to observe, witness, record, and not interfere in the process of human civilization. It wasn't until 3600 years later that he saw the sword Zhu Youjian wielded towards his daughter...