Does the eldest grandson Wuji have a personal grudge against Li Yuanjing?

No, no, no, important things said three times.

1. The eldest grandson Wuji was hated by Wu Zetian, because although the eldest grandson Wuji was deeply rewarded by the royal family, he had always opposed Wu Zetian's regency, which became a major obstacle to Wu Zetian's plot to seize the throne.

2. When the eldest grandson Wuji was in power, he controlled the government, and Li Zhi was a puppet.

3. No matter which monarch is, he is suspicious, if someone is very capable, he will have a very strong sense of crisis, and he is afraid of seeking to usurp the throne.

Tang Gaozong was cowardly and mediocre, it was the eldest grandson Wuji who single-handedly put him on the throne, of course, the eldest grandson Wuji wanted to continue to hold power after Tang Taizong, which was the main reason why the eldest grandson Wuji insisted on making him the crown prince, and it was ironic that it was this mediocrity and cowardice that finally caused the eldest grandson Wuji to die.

Yes, Li Zhi felt unprecedented pressure, because the power of the eldest grandson Wuji was indeed quite large, so Li Zhi needed to rely on Wu Zetian.

Li Zhi did feel unprecedented pressure, so he began to suppress the eldest grandson Wuji, but it was already too late.

The ending of the eldest grandson Wuji was not good. In the tenth year of Li Zhi's reign as emperor, the eldest grandson, Wuji, was stripped of his official position and sentenced to exile on charges of treason, and later forced to hang himself.

The eldest grandson Wuji made many achievements for the Tang Dynasty, but he failed to get a good death, because he opposed Wu Zetian, and was finally executed by the powerful Wu Zetian, and the ending was embarrassing.

Died in the court struggle, was framed to death for resenting the lord, and his family could not escape death, and was executed by the court.

treacherous and insidious, good sycophant, and exquisite, he tried his best to assist the weak and incompetent Li Zhi to ascend the throne, so that he could control himself.

Since Li Tai and Li Zhi are both Wuji's nephews, why is Wuji so thin? This has to do with the fact that he wants to engage in the dictatorship of his relatives. It must be known that in Zhenguan's later years, his power was growing day by day, and he had the power to influence the government, and in order to consolidate his vested interests, he certainly liked to support a weak and obedient nephew as a prince, so as to manipulate the power in the future.

For this reason, he tried his best to beautify Li Zhi and praised Li Zhi's cowardice as "benevolence and filial piety". Once the heir of "benevolence and filial piety" Li Zhi, there will be no problem with his unauthorized power.