Historically, the emperor did serve as prime minister in Wuzhou, and he did persuade Wu Zetian to conform to the people's hearts and return to the position of king Luling. According to historical records, from the perspective of mother-child affection, the emperor advised the elderly Wu Zetian: "Lizi, after a thousand years, will eat with the ancestral temple and live endlessly; The nephew did not know that he was the son of heaven and attached it to the temple. "

These words are tantamount to a plate of cold water, which ruined Wu Zetian's hope of being a crown prince after establishing the Wu family. The point of this sentence is that Empress Wu Zetian did not live in the shadow of her husband Li Zhi, but lived helplessly under her husband's power. In 699, Wu Zetian recalled Li Xian, king of Luling, and re-established himself as a prince. As for why Li Xian was established instead of Li Dan, it was of course influenced by "long-term intention". More importantly, Wu Zetian respected her husband's rights. After all, Li Xian was the prince of Tang Gaozong, and Li Dan was her prince after Wu Zetian deposed Li Xian.