The reason why Crown Prince Qing Yuannian laughed after being grounded for three days was because he had successfully achieved his goal. He had deliberately prepared this plan and achieved the results he wanted during the three days of being grounded. The Crown Prince's smile was both a praise for his own intelligence and a mockery for others who had been deceived. The specific reason for the smile was not explicitly mentioned in the search results provided, but it could be speculated that the prince's scary smile was because he had successfully achieved his goal, and his smile carried a sense of evil and complacency.
Maybe something good happened that made him happy and that's why he smiled.
The reason why the Crown Prince had framed the Second Prince was to prevent Fan Xian from taking away the power of the palace treasury and to give the Qing Emperor a reason to start a war against Northern Qi. The Crown Prince understood the Qing Emperor's thoughts and knew that the Qing Emperor needed a reason to start a war. Thus, he used the lack of evidence to frame the Second Prince to satisfy the Qing Emperor's needs. To be more specific, after Lin Gong was killed, the Crown Prince used his brother's grievance as an excuse to barge into the Inspectorate and make a scene to save Si Lili. After being stopped, he rushed directly to the Qing Emperor and accused the Second Prince of being Lin Gong's murderer, disregarding any evidence. Such behavior could be interpreted as the Crown Prince framing the Second Prince for his own interests and power to achieve his own goals.
The reason the Crown Prince had framed the Second Prince was to prevent Fan Xian from taking away the power of the palace treasury and to give the Qing Emperor a reason to start a war against Northern Qi. The Crown Prince understood the Qing Emperor's thoughts and knew that the Qing Emperor needed a reason to start a war. Thus, he used the lack of evidence to frame the Second Prince to satisfy the Qing Emperor's needs. To be more specific, after Lin Gong was killed, the Crown Prince used his brother's grievance as an excuse to barge into the Inspectorate and make a scene to save Si Lili. After being stopped, he rushed directly to the Qing Emperor and accused the Second Prince of being Lin Gong's murderer, disregarding any evidence. Such behavior could be interpreted as the Crown Prince framing the Second Prince for his own interests and power to achieve his own goals.
The reason why Crown Prince Qingyu Nian and the Second Prince rebelled was their struggle for the throne and their sense of threat to Fan Xian. The Crown Prince's goal of slandering the Second Prince was to stop Fan Xian from taking away the power of the palace treasury and to give the Qing Emperor a reason to start a war against Northern Qi. The Crown Prince understood the Qing Emperor's thoughts and knew that the Qing Emperor needed a reason to start a war. Thus, he used the lack of evidence to slander the Second Prince to satisfy the Qing Emperor's needs. The Second Prince believed that Fan Xian was the son of the Qing Emperor and Ye Qingmei and was likely to become the person most likely to ascend the throne. In order to seize the throne, he raised an army to rebel. In the end, the Second Prince's rebellion failed and he was imprisoned. The Qing Emperor's attitude toward the Second Prince was harsh. In the end, the Second Prince chose to commit suicide.
The reason why Crown Prince Qingyu Nian and the Second Prince rebelled was their sense of threat to Fan Xian and their motive for fighting for the throne. The Second Prince believed that Fan Xian was the son of the Qing Emperor and Ye Qingmei, and that he had the highest chance of ascending the throne. Both the Crown Prince and the Second Prince wanted to protect their own interests and power, so they took the action of rebellion. In the end, their rebellion plan failed. The Crown Prince committed suicide, and the Second Prince committed suicide after being suppressed by Fan Xian. This information could answer the question of why the Crown Prince and the Second Prince rebelled.
The reason why Crown Prince Qingyu Nian and the Second Prince rebelled was their sense of threat to Fan Xian and their motive for fighting for the throne. The Second Prince believed that Fan Xian was the son of the Qing Emperor and Ye Qingmei, and that he had the highest chance of ascending the throne. Both the Crown Prince and the Second Prince wanted to protect their own interests and power, so they took the action of rebellion.
The reason why Crown Prince Qingyu Nian and the Second Prince rebelled was their sense of threat to Fan Xian and their motive for fighting for the throne. The Second Prince believed that Fan Xian was the son of the Qing Emperor and Ye Qingmei, and that he had the highest chance of ascending the throne. Both the Crown Prince and the Second Prince wanted to protect their own interests and power, so they took the action of rebellion.
In the TV series " Celebrating Years," the Crown Prince had framed the Second Prince because of the Eldest Princess 'instigation. In order to prevent the Second Prince from ascending to the throne, the Eldest Princess Li Yunrui had decided to work with the Crown Prince to overthrow the Second Prince. Thus, she had deliberately shown the letter the Second Prince had written to Si Lili to the Crown Prince, making him misunderstand that the Second Prince was colluding with Northern Qi. Because of this, the Crown Prince framed the Second Prince in front of the Emperor, causing the Second Prince to be neglected by the Emperor.
In the TV series " Celebrating Years," the Crown Prince accused the Second Prince because the Eldest Princess Li Yunrui and the Second Prince conspired to overthrow the Crown Prince and let the Second Prince ascend the throne. Li Yunrui used her power in the palace to spread some unfavorable rumors about the Crown Prince. At the same time, she also spoke to the Emperor, asking the Crown Prince to abdicate. The Crown Prince had no choice but to complain to the Emperor, accusing the Second Prince of conspiring with Li Yunrui.
The prince chose to commit suicide in "Celebrating Years." After the Qing Emperor learned of the relationship between the Crown Prince and the Eldest Princess, he abolished the Crown Prince and placed the Eldest Princess under house arrest. After the Eldest Princess failed to assassinate the Qing Emperor, the Crown Prince and Eldest Princess decided to commit suicide. The Crown Prince and the Eldest Princess had a relationship that transcended ethics. The Eldest Princess had sent people to assassinate Fan Xian, but Fan Xian had escaped. In order to take revenge on the Eldest Princess, Fan Xian told the Qing Emperor about the special relationship between the Crown Prince and the Eldest Princess. After the Qing Emperor learned, he put the Eldest Princess under house arrest and prepared to depose the Crown Prince. After the Eldest Princess learned of the Qing Emperor's plan, she secretly joined forces with the Qin family and the Ye family in an attempt to kill the Qing Emperor and let the Crown Prince ascend the throne. However, the Ye family was the Qing Emperor's spy. The Eldest Princess 'plan had been leaked from the beginning. After the Eldest Princess 'rebellion failed, the Eldest Princess and Crown Prince chose to commit suicide.