Ye Qingmei had once lived in Taiping Courtyard.
The Qing Emperor was guarding Taiping Courtyard.
Taiping Courtyard had once housed Ye Qingmei, Eldest Princess Li Yunrui, and the Qing Emperor.
Taiping Courtyard had once housed Ye Qingmei, Eldest Princess Li Yunrui, and the Qing Emperor. The resident of Taiping Courtyard was Ye Qingmei.
The general guarding Taiping Courtyard was the Qing Emperor.
The archer from Taiping Courtyard was the ninth-grade archer, Yan Xiaoyi.
The secret of Taiping Courtyard was the Forbidden Door. The bottom of Taiping Courtyard's lake hid a forbidden door. This door involved Fan Xian's birth and people's birth, aging, illness, and death. It was the fairest thing in the world. The Forbidden Door might have something to do with the way Fan Xian came to this world and the laboratory that led to the frozen world. In her letter to Fan Xian, Ye Qingmei had mentioned that there was a forbidden door at the bottom of Taiping Courtyard's lake. This was the final location of all secrets. Whether or not Fan Xian decided to reveal this secret and the possible consequences of revealing it was one of the important plots in the story. In order to protect this secret, the Qing Emperor sent a large number of troops to guard Taiping Courtyard. Ye Qingmei's true cause of death was also related to the secret of Taiping Courtyard. However, the details of the secret were not mentioned in the search results provided.
The truth about Taiping Courtyard was not fully revealed in the original novel. In her letter to Fan Xian, Ye Qingmei mentioned that there was a forbidden door hidden at the bottom of Taiping Courtyard's lake. It might be a laboratory. There might be modern high-tech equipment and scientific literature inside. Ye Qingmei also mentioned that Fan Xian might be one of her experiments. The secrets of Taiping Courtyard might pose a threat to Fan Xian. However, the exact truth and hidden secrets of Taiping Courtyard were still unknown. Therefore, there was no clear answer to the truth of Taiping Courtyard and the ending of the original novel.