During the Zhenguan period, the relationship between Li Chengqian and Zhangsun Chong was not clearly answered in the search results provided. Therefore, I do not know the specific situation between Li Chengqian and Zhangsun Chong during the Zhenguan period.
During the Zhenguan period, there were many reasons for Li Chengqian's rebellion. First of all, Li Shimin had high expectations for Li Chengqian. After the incident at Xuanwu Gate, he became the Crown Prince of the Tang Dynasty. As the eldest son, Li Chengqian naturally became the Crown Prince. However, Li Chengqian was worried that his position as Crown Prince was unstable and could be deposed. In addition, Li Chengqian was also worried that he would be deposed and decided to take the risk because his position as Crown Prince was unstable. He had a notorious reputation, was plagued by illness, had no trust from Taizong, and no support from the courtiers. He was in dire straits. In the 15th year of Zhenguan, Li Chengqian secretly led a group of Turkic officials into the palace. This behavior aroused the dissatisfaction of Emperor Taizong of the Tang Dynasty, which eventually led to his abolition of the crown prince position.
Empress Zhangsun was the empress of Emperor Taizong of the Tang Dynasty, Li Shimin, and Li Chengqian was their eldest son. Empress Zhangsun gave birth to three sons, namely Li Chengqian, Li Tai, and Tang Gaozong Li Zhi. Li Chengqian grew up under the favor of Emperor Taizong of Tang Dynasty and was made the crown prince. However, after Empress Zhangsun's death, Li Chengqian became absurd, indulged his own desires, and even rebelled. Finally, he was deposed. As for the specific situation of Empress Zhangsun and Li Chengqian, the search results did not provide a definite answer.
Zhenguan Longsong was a TV series that told the story of Emperor Taizong of the Tang Dynasty, Li Shimin, and Empress Zhangsun. Li Shimin was a wise ruler, while Empress Zhangsun was regarded as a virtuous empress. They had three sons and four daughters. Empress Zhangsun showed her wisdom and ability as an empress in the play and played an important role in assisting Li Shimin's imperial career. Empress Zhangsun knew how to manage the harem. She did not interfere with the government and let the men settle their affairs. She set an example and used her personal charm to convince the concubines in the harem to avoid chaos. It was obvious that Empress Zhangsun valued Li Shimin. Their relationship was very good. However, regarding the specific plot and details of Li Shimin and Empress Zhangsun in the Zhenguan Long Song, I can't find the answer in the information provided.
During the Zhenguan period, Li Chengqian was deposed as a commoner. During the fight for the throne between Emperor Taizong of the Tang Dynasty and Li Tai of the Wei Dynasty, Li Chengqian was deposed due to his rebellion. This court dispute had an impact on the fate of the officials involved. Li Chengqian's epitaph also mentioned his experience of being humiliated by the Lord and deposed by the ministers.
The actor who played Li Chengqian in the Zhenguan Long Song was Lu Xing.
Yes, Li Chengqian was the eldest son of Empress Zhangsun.
Yes, Li Chengqian was Empress Zhangsun's son.
Yes, Li Chengqian was the son of Empress Zhangsun.
Yes, Li Chengqian was the eldest son of Emperor Taizong and Empress Zhangsun.
We can conclude that during the Zhenguan period, there was indeed a quarrel between Li Chengqian and Li Shimin. According to the first document, Li Chengqian felt the pressure from Li Shimin and Li Tai. The second document mentioned that Li Tai had once threatened Li Zhi behind his back, but Li Zhi had reported him. The third document described Li Chengqian angrily expressing his unwillingness to be the Crown Prince in Taiji Palace. From then on, there was no Crown Prince in Zhenguan. The fourth document mentioned that Li Shimin decided to make Li Chengqian the Crown Prince, but he was so angry that he fell ill. Combining all this information, it could be concluded that during the Zhenguan period, there was indeed a quarrel between Li Chengqian and Li Shimin.