One of the Eight Immortals of Taoism. According to legend, he is the great prince's uncle, named Shu, and also served as the king's withdrawing army. Cao Guojiu's younger brother went to Beijing to test the beauty of the scholar's wife, hanged the scholar and stole his wife. The ghost of the scholar appealed to Bao Zheng, and Bao Gong allowed them to investigate. Cao Guojiu told his younger brother that he must kill the scholar's wife to avoid future trouble. So my second uncle threw the scholar's wife into the well and she escaped. On the way, I met Cao Guojiu and mistook him for Bao Zheng. She appealed to Cao Guojiu, and Cao Guojiu was frightened. His men killed the scholar's wife with iron bars. His men thought she was dead and left her in a remote alley.
After the scholar's wife woke up, she complained to Bao Gong. After Bao Gong asked the truth, she cheated, and Cao Guojiu came to Bao Zheng. Bao Zheng ordered the scholar's wife to sue and put Cao Guojiu in prison one by one. Another fake letter sent my second uncle to Kaifeng to let this woman complain. Send my second uncle to prison. Queen Cao and herself came to persuade Bao Zheng to release her two younger brothers, but Bao Zheng refused and ordered her second uncle to be executed. Song Renzong forgives the world. Bao Gong released Cao Guojiu.
After Cao Guojiu was released, he went into the mountains to practice and disappeared from the mountains. He is determined to study Buddhism and immortals. One day, Zhong Liquan and Lv Dongbin asked him, "What do you have?" "Cao Guojiu said," I have tao. The fairy smiled and asked, "Where is the Tao?" Cao Guojiu pointed to heaven and said, "The Tao is in heaven." The fairy asked again, "Where is the sky?" Cao Guojiu pointed to the heart. Zhong Liquan and Lv Dongbin said with satisfaction: "The heart is the sky, and the sky is the Tao. You have understood the true meaning of the Tao." One by one, he was awarded the "true secret letter" and asked to practice seriously. Soon, Cao Guojiu became an immortal.