Sibling relationship. Si Nuo and Pei Heng are both figures who worship their ancestors with salted fish. In Sacrificing Ancestors with Salted Fish, Pei Changle and Pei Xun are twins, Pei Changle is the protagonist, Pei Xun is the villain, Xue is Pei Changle's sister, Pei Changle and Pei Xun are half-brothers, and Xue and Pei Changle are half-brothers.