The main reason why Li Chengqian was deposed as the Empress was because of his lack of virtue and his suspicion of rebellion. Li Chengqian's character was corrupt. He indulged in wine, sex, and entertainment, wasting the country's financial and material resources. He lost the trust and love of his father and his subjects. In addition, he also befriended some crafty people and listened to their instigation. Li Chengqian was also suspected of rebellion and attempted to assassinate Li Tai, but failed. These actions made Li Shimin think that Li Chengqian was not suitable to be the monarch, so he abolished Li Chengqian's position as the Crown Prince and exiled him to Qian Prefecture.
The reason why Crown Prince Li Chengqian was deposed was related to the palace coup he had planned. According to historical records, Prince Li Chengqian plotted to force the palace to rebel in the 17th year of Zhenguan, but after the matter was exposed, he was deposed as a commoner and exiled to Qianzhou. This coup might have been because Li Chengqian was worried that his position as Crown Prince would be lost, and Emperor Taizong's other son, Li Tai, was deeply favored by the Emperor, forming a threat to the Crown Prince. Thus, Crown Prince Li Chengqian's coup led to his fate of being deposed as a commoner.
The reason why Crown Prince Li Chengqian was deposed was related to the palace coup he had planned. According to records, during the reign of Emperor Taizong, the fight for the position of Crown Prince was extremely intense. Li Chengqian was Taizong's eldest son, but he was worried that his position as prince would not be guaranteed, so he plotted to force the palace to rebel in the 17th year of Zhenguan. As a result, the matter was exposed, and he was deposed as a commoner and exiled to Qianzhou. The failure of the coup had affected the fate of Li Chengqian and his followers. The epitaph's record of 'the Lord was humiliated before, and the minister was deposed after' may have implied this incident. Although Li Chengqian was deposed, the one who finally ascended the throne was Tang Taizong's ninth son, Li Zhi.
There were many reasons why Li Chengqian was deposed as the Crown Prince. First of all, his conduct was corrupt, and he had lost the trust and love of his father and his subjects. He did not obey his father's orders, did not respect his teachers, did not care about political affairs, indulged in wine, sex, and pleasure, wasting the country's financial and material resources. He had also befriended some crafty people and listened to their instigation, betraying his father and country. Secondly, Li Chengqian's rebellion violated his father's bottom line and endangered the country's security and stability. He attempted to assassinate his brothers and ministers, and even wanted to overthrow his father's rule and seize the throne. Such behavior forced Li Shimin to depose his position as Crown Prince and exile him to other places. In general, Li Chengqian's misbehavior and rebellion were the main reasons for his dethronement.
There was no clear answer as to why Li Hong had been deposed as Empress. The search results mentioned some background information about Li Hong being made Crown Prince and Wu Zetian's power, but they did not provide any specific reasons or events. Therefore, according to the information provided, I don't know the specific reason why Li Hong was deposed as Empress.
Prince Li Chengqian was deposed as a commoner because of his rebellion.
There were many reasons why Li Chengqian was deposed as the Crown Prince. First, he had colluded with Li Yuanchang, the King of Han, Du He, and Hou Junji, the son-in-law of Princess Chengyang, in an attempt to force the abdication of the throne. However, his plan had been exposed and he had been deposed. Secondly, Li Chengqian's character was corrupt. He indulged in wine, sex, and entertainment, wasting the country's financial and material resources and losing his duty as the crown prince. In addition, he abandoned his studies, disrespected his teachers, and even assassinated his own teacher. These actions disappointed Emperor Taizong of the Tang Dynasty and made him feel that he was not suitable to become a monarch. Therefore, Emperor Taizong of the Tang Dynasty decided to abolish Li Chengqian's position as Crown Prince and demote him to a commoner.
The reason why Prince Li Chengqian was deposed by his father might be related to his plot to force the palace to rebel in the 17th year of Zhenguan. Li Chengqian was the eldest son of Emperor Taizong of the Tang Dynasty. He was made the crown prince when he was eight years old. However, Taizong's fourth son, Li Tai, was deeply favored by Taizong. Li Chengqian was worried that his position as Crown Prince would not be guaranteed, so he plotted to launch a coup. However, the coup failed. Li Chengqian was deposed as a commoner and exiled to Qian Prefecture. Although Li Chengqian was deposed, Li Tai did not ascend to the position of Crown Prince as he wished and was also exiled. In the end, Emperor Taizong's ninth son, Li Zhi, became the emperor. Therefore, Li Chengqian was deposed because he participated in a failed coup.
He could find many novels about the deposed Crown Prince, Li Chengqian. One of them was " The Rebirth of Li Chengqian, the Crown Prince of the Tang Dynasty ", which told the story of a modern otaku who traveled to the 17th year of Zhenguan in the Tang Dynasty and became the Crown Prince Li Chengqian. Crown Prince Li Chengqian was facing the crisis of deposing the Crown Prince. The people around him also had ulterior motives and constantly encouraged him to rebel. The other novel was " Tang Dynasty: Starting from the Deposed Crown Prince's Registration ". The story was about the deposed Crown Prince Li Chengqian awakening the registration system after he was exiled to Qianzhou. Through his efforts and contributions, the deposed Crown Prince was praised and respected by the people. There was also a novel called " The Great Tang: Self-Deposing the Crown Prince at the Beginning ", which told the story of a 21st-century teenager who accidentally transmigrated to become the Crown Prince of the Great Tang, Li Chengqian. He had awakened the system and requested to depose himself as the Crown Prince, which shocked the imperial court. The above was the answer based on the search results provided.
Many novels about the deposed Crown Prince Li Chengqian could be found, including " The Great Tang: Starting from the Deposed Crown Prince " and " The Great Tang: Starting from the Deposed Crown Prince's Position ". These novels told the story of the exiled Crown Prince Li Chengqian, as well as the plot of him awakening the system in the place of exile and winning the praise and respect of the people through his hard work and contribution. However, due to the limited search results provided, it was impossible to know the specific plot and content of these novels. Therefore, if you want to read the novels of the deposed Crown Prince Li Chengqian for free, it is recommended to further search or consult the relevant reading platforms.
Yes, Li Chengqian was the eldest son of Empress Zhangsun.