The Li Tang Dynasty fell into a state of turmoil after Li Zhi. Zhang Kamzhi and others launched the Shenlong coup d'état, which reversed the chaos and regained the power of the Tang Dynasty back to the hands of the Li family. After the Shenlong coup, Wu Zetian abdicated, and the throne was passed on by Wu Zetian to the crown prince Li Xian. Li Xian succeeded to the throne as empress, but due to his cowardly and incompetent personality, the power of the imperial government slowly fell into the hands of Empress Wei and Princess Anle. The "Five Kings of the Divine Dragon" who regained the throne for Li Xian was also demoted to a demotion. Crown Prince Li Chongjun was killed. Wei Hou emulated Wu Zetian's original move, and Wei Hou wanted to become Wu Zetian's second to control the Tang Dynasty again. In the end, even Emperor Zhongzong of Tang died at the hands of Wei Hou.
Li Longji is the representative of the power of the small and medium-sized landlord bureaucracy, while Princess Taiping is the representative of the power of the merchant landlord bureaucracy, and the action of killing Princess Taiping is the peak of the contradiction and conflict between li tang orthodox forces and decadent bureaucratic forces; the second view is that Princess Taiping still hopes to continue the influence of the Wu clique on the imperial court, and Princess Taiping is essentially a member of the Wu clique; Li's holding of virtual power and her own real power is the result that Princess Taiping most wants to see.
After Tang Ruizong succeeded to the throne, he should have made his eldest son Li Chengqi the crown prince, but Li Chengqi was loyal and benevolent, and insisted on ceding the position of prince to his younger brother Li Longji, who had made great contributions to the Tang Long's coup, and Li Longji also repeatedly pleaded with his eldest brother Li Chengqi to take over the position of prince, so the brothers let him go, and finally Li Chengqi cried and begged Tang Ruizong to give the position of prince to Li Longji, so Li Longji was grateful to his brother Li Chengji all his life. At this time, Princess Taiping had already gained power, and was deeply trusted by Tang Ruizong, but she saw That Li Chengqi as a loyal and benevolent person, believing that Li Chengqi would be easy to manipulate in the future, and after she held great power, she also wanted to emulate her mother Wu Zetian and her sister-in-law Empress Wei as the empress dowager who monopolized power, so she again planned to persuade her brother Li Dan to re-establish Li Chengqi as the crown prince, and Princess Taiping's wishful thinking was looked at by Li Chengqi, Who knew that Princess Taiping wanted to use herself as a puppet, and in order to consider the overall situation, Li Chengqi resigned all her powers and was willing to be an official.
Li Longji and Princess Taiping are both powerful people, and neither of them is willing to obey each other, just like a mountain does not tolerate two tigers, and Li Longji and Princess Taiping can never get along with each other. Li Longji had been cultivating his own forces, just did not want the "second Wu Zetian" to appear, so he immediately executed Princess Taiping as soon as he had the opportunity.