One bad thing could be betrayal. For example, a character who has been a friend for a long time suddenly betrays another character for personal gain. This can create a lot of conflict and drama in the story.
Yes, it's possible. Bad things in fiction can make the plot more interesting or help us understand characters better. They can also serve as a contrast to highlight the good.
In the middle of Qing Yu's life, the Second Prince, Li Chengze, had done a series of bad things. He colluded with the Eldest Princess Li Yunrui and used her authority in the Qing Kingdom's palace treasury to carry out smuggling activities, embezzling money and raising private soldiers. He had also cooperated with the Eldest Princess to deceive the Qing court, making everyone mistakenly believe that the Crown Prince and the Eldest Princess had a close relationship, but it was in fact an illusion. In addition, the Second Prince also participated in a rebellion plan, which eventually led to his failure and suicide. As a result, the Second Prince did a series of bad things in the Qing years.
In the middle of Qing Yu's life, the Second Prince, Li Chengze, had done a series of bad things. He colluded with the Eldest Princess Li Yunrui and used her authority in the Qing Kingdom's palace treasury to carry out smuggling activities, embezzling money and raising private soldiers. He had also cooperated with the Eldest Princess to deceive the Qing court, making everyone mistakenly believe that the Crown Prince and the Eldest Princess had a close relationship, but it was in fact an illusion. In addition, the Second Prince had also murdered Fan Xian in order to fight for the throne.
In the middle of Qing Yu's life, the Second Prince, Li Chengze, had done a series of bad things. He colluded with the Eldest Princess Li Yunrui and used her authority in the Qing Kingdom's palace treasury to carry out smuggling activities, embezzling money and raising private soldiers. He had also cooperated with the Eldest Princess to deceive the Qing court, making everyone mistakenly believe that the Crown Prince and the Eldest Princess had a close relationship, but it was in fact an illusion.
In the middle of Qing Yu's life, the Second Prince, Li Chengze, had done a series of bad things. He colluded with the Eldest Princess Li Yunrui and used her authority in the Qing Kingdom's palace treasury to carry out smuggling activities, embezzling money and raising private soldiers. He had also cooperated with the Eldest Princess to deceive the Qing court, making everyone mistakenly believe that the Crown Prince and the Eldest Princess had a close relationship, but it was in fact an illusion.
In the middle of Qing Yu's life, the Second Prince, Li Chengze, had done a series of bad things. He colluded with the Eldest Princess Li Yunrui and used her authority in the Qing Kingdom's palace treasury to carry out smuggling activities, embezzling money and raising private soldiers. He had also cooperated with the Eldest Princess to deceive the Qing court, making everyone mistakenly believe that the Crown Prince and the Eldest Princess had a close relationship, but it was in fact an illusion.
In the middle of Qing Yu's life, the Second Prince, Li Chengze, had done a series of bad things. He colluded with the Eldest Princess Li Yunrui and used her authority in the Qing Kingdom's palace treasury to carry out smuggling activities, embezzling money and raising private soldiers. He had also cooperated with the Eldest Princess to deceive the Qing court, making everyone mistakenly believe that the Crown Prince and the Eldest Princess had a close relationship, but it was in fact an illusion.