About Bigan and Qiqiao Linglongxin, the book records are as follows: "In the late Shang Dynasty, Emperor Xin (King Zhou) was violent and debauched, and imposed excessive taxes and expropriations. Bigan sighed and said: "It is unfaithful to fail to admonish the master. "It is not brave to be afraid of death and not speak out. If you go too far, you will die if you don't use your advice, and you are loyal to the end." Then he went to Zhaixing Tower to give advice and did not leave for three days. Zhou asked why he relied on himself, and Bi Gan said: "I rely on my good deeds, benevolence and righteousness, so I rely on myself." Zhou He said angrily: "I heard that the saint's heart has seven orifices. Do you believe that there are any?" "Then he killed Bigan and dissected his heart, and he was found to be 64 years old." Therefore, the so-called Qiqiao Exquisite Heart is just a metaphor for a saint or a virtuous person.