Zhang Sanlian is a very powerful person. He is also a captain who touches gold. In his generation, he was the only one in this vein, and there were three gold characters, so he wore all three gold characters around his neck, so others called him Zhang Sanlian. Zhang Sanlian went to the tomb and got all 16 hexagrams. In his later years, he wrote a book called sixteen-character Yin-Yang Mystery. Then he was worried that the venting opportunity would be cursed by God, so he tore the book in half, half of it was burned, and the other half was finally transferred to Hu Bayi.
Zhang San's chain is good at divination and calculation. Zhang Yingchuan inherited most of Zhang San's chain skills. After seeing Hu Bayi, he used only a few leaves to calculate the dangers that Hu Bayi would encounter in the future, which made Hu Bayi very wary.