The ending of " The Crown Princess 'Promotion " would be 26 episodes later. Because this drama was an online drama, there might be some different versions and interpretation. However, according to what I know, Qi Sheng and Zhang Pengpeng were sentenced to death because the Emperor found out that they had an affair with another concubine, and that concubine was also the Emperor's sister. In order to protect his sister, the Emperor ordered Qi Sheng and Zhang Pengpeng to die. Those people might include the people around the emperor, such as strategists and eunuchs. They might think that Qi Sheng and Zhang Pengpeng were unfaithful and unworthy of being the Crown Princess and Empress, so they decided to get rid of them to ensure the smooth succession of the Crown Prince. It should be noted that this ending was only a plot in the TV series and did not represent the ending of the original author's novel. The ending of the novel might be different, and the reader had to read and understand it on his own.