In 754, An Lushan, who had launched the An Shi Rebellion, was killed by his son An Qingxu, and after An Lushan died, his son could only leave the matter to someone his father had trusted before. However, those who had previously assisted An Lushan were very tired of An Qingxu's killing of his father, and the most emotional person among them was Shi Siming. Shi Siming was a close confidant of An Lushan, and he was very incomprehensible about An Qingxu's killing of An Lushan, so he had the idea of rebellion, and eventually Shi Siming defected to the Tang Dynasty.
After Shi Siming surrendered to the Tang Dynasty, Emperor Suzong of Tang made him the King of Guiyi and held the posts of Envoy of Fanyang Changshi and Jiedu of Hebei. In order to test Shi Siming's loyalty, Tang Suzong asked him to attack the rebels. However, Shi Siming had other thoughts, don't look at his superficial surrender, but secretly he has been buying soldiers and horses, which made Tang Suzong suspicious. In May 758, the Tang Su Sect sent Wu Cheng'en to secretly investigate Shi Siming. In the evening, Wu Cheng'en dressed as a woman and ran to the home of Shi Siming's subordinates to persuade him to rebel, and as a result, his subordinates immediately told Shi Siming the news.
After Shi Siming knew, he was particularly angry in his heart, but there was not much evidence, and he did not dare to do anything to Wu Cheng'en. Later, Shi Siming sent someone to sneak under Wu Cheng'en's bed, overheard Wu Cheng'en's conversation with his son, saying that he would report to the emperor to get rid of Shi Siming, a rebellious thief. When Shi Siming learned of this, he led the army to capture Wu Cheng'en and his son, and killed both of their father and son.
After Shi Siming's rebellion was successful, he declared himself the King of great Saint Zhou. Tang Suzong, under the lure of the eunuch Yu Chao'en, let the army blindly attack, resulting in Heyang, Huaizhou and other places being occupied by Shi Siming. Immediately afterward, Shi Siming planned to attack Shaanzhou, so he sent soldiers to build the Triangle City within a month to store grain in wartime. This task was completed by Shi Siming's son Shi Chaoyi, but before the cement was applied later, Shi Siming came to check it. He was very angry and scolded his son, who explained that the soldiers were too tired to complete the task. Shi Siming shouted at his son, "When I defeat the enemy, I will kill you first." ”
Shi Chaoyi saw that his father was so angry, and quickly gathered the soldiers around him, who suggested that Shi Chaoyi kill his father to get rid of the trouble. Shi Chaoyi did not have the courage at first, but the soldiers provoked him by surrendering to the Tang Dynasty, and he had to agree. In the end, the crowd captured Shi Siming and forged an edict for Shi Chaoyi to inherit the position, and finally Shi Siming was strangled to death with ropes by many soldiers.
Shi Siming may not have thought that he and An Lushan were in the same end, and they were all killed by their sons.