Although the famous ancient painter Di was the prime minister of the Wu and Zhou Dynasties, he always cared about the Tang Dynasty. In the first year of the holy calendar (698), when discussing the issue of succession to the throne with him, Wu Zetian also advised Wu Zetian in person: "Your Majesty is the queen of Emperor Gaozong, and when Emperor Gaozong was seriously ill, he has the right to supervise the country; After the death of Emperor Gaozong, your majesty has been in the world for more than ten years. Since we are discussing the issue of heirs, I don't think it is necessary to consider other candidates except Li Tang's descendants. " This view should be said to represent the wishes of most courtiers at that time
Because of his affinity with the Tang Dynasty, De Renjie made many substantial contributions to the restoration of the Tang Dynasty. First of all, relying on Wu Zetian's esteem for him, he actively persuaded him to marry Li Xian (Tang Zhongzong), king of Luling, which laid a solid foundation for Li Xian to re-establish himself as a prince soon. As an intellectual educated by orthodox Confucianism, Di always regarded the Tang Dynasty as a new moon. He was loyal to Empress Wu Zetian of the Tang Dynasty, not Wu Zetian of the Wu Zhou Dynasty. In the face of Wu Zetian's hesitation in choosing an heir, he earnestly persuaded: "Emperor Taizong braved the wind and rain, kissed the front and leveled the world, just to pass it on to future generations. Emperor Gaozong entrusted his two sons (Li Xian and Li Dan) to His Majesty, but His Majesty wanted to give the world to others, which was against God's will. In addition, aunt and nephew, or mother and son, which is closer? Your majesty established his son Chu Jun, who has a long life and fireworks; If you set up a nephew (Wu), because the nephew is the son of heaven, there is no precedent for offering sacrifices to your aunt. " Under the patient persuasion of this kind of affection and interest, Wu Zetian's attitude towards the establishment of a buffer region began to favor Li's descendants, which took a substantial step to re-establish himself as a prince and restore the Tang Dynasty.
Secondly, Di Renjie recommended a large number of talents for the revival of the Li Tang regime. As an outstanding politician, he realized very early that the regime of Wu Zhou would end with the death of Wu Zetian, and the revival of Li Tang Dynasty was inevitable. The successful welcoming back of King Luling is only the first step to the success of the revival plan. After Li Xian, the king of Luling, was re-established as a prince, in order to ensure his position, he must have a large number of assistants around him, and these talents will become the backbone of Li Tang's revival. To this end, Di spared no effort to recommend and explore talents, such as Yao Chong, Li Qiao, Wei and others who became prime ministers under his recommendation; Later, the backbone of the coup in the Tang Dynasty, including Zhang Jianzhi, Jing Hui, Yuan, Huan, Cui and others, were also Di Gong's peaches and plums. This batch of talents listed by Di Renjie later became a generation of famous ministers.
It is precisely because of the above reasons that in the works of literati in the past dynasties, Di became the hero of the restoration of the Tang Dynasty and has always been admired by future generations.