In order to make Yu Ci become a god, Bao'er sent him to the mortal world, but he didn't want the pain of love to be too poisonous. Yu Ci couldn't bear it, his memory was sealed, and he forgot his relationship with Qingyun. Because he was fused with Qingyun's dragon ball, he always felt familiar. Later, in order to help Bao'er, several people traveled to the mortal world again, and started a love-hate relationship.
Purpose: Learning history is important