After learning that he can live another hundred years, Caixuan begins to learn about the building period. The building period is divided into three parts: heaven, earth, and humans. He decides to build a human foundation on the path of the human being. He thinks about making a foundation pill, but it's too expensive, so he decides to become a medicine apprentice. The pill requires mastery of five of the five grasses and trees, and promotion assessment. The assessment must be done at least five times, and the mastery must be at least three times as good as that of Caixin. Caixin's admirers are too scary, and they're afraid that they'll cut him into pieces, so Caixin has to stay hidden. The third stone tablet shows the drawing of a little turtle again. Everyone is amazed, and Caixin wants to be the first on the seven stone monuments. He tells his friends that if anyone knows the little turtle's identity, he'll give them a favor if they tell him. He's heard that Caixin is courting both Caixin and Du lingfei, and he's going to fight him.