The original version of the first volume of the Book of Northern Qi could be found in the 1972 edition of the first volume of the Book of Northern Qi. Volume 1 to Volume 2 and 3 were found in Li Baiyao, Zhonghua Bookstore.

The original version of the Northern Qi school map was hidden in the Boston Art Museum.
The books on the Northern Qi statues referred to calligraphy works from the Northern Qi period. Northern Qi regular script had different styles and styles, which could be divided into four categories. The first type was the remnants of the Luoyang style, such as Cui Fen's Epitaph and Yuan Xian's Epitaph. The second type is the wide and broad square, such as "Zhao Wang Gao Rui Temple Ode" and "Xiangcheng County Wang Gao Yu Epitaph." The third type was those with beautiful and neat words, such as the Juan Shura Stele and Zhu Dailin's Epitaph. In addition, there were some statues that could be classified into these categories, such as Cai Yuanxing's Statue and Wang Lian's Wife Zhao's Epitaph. The Northern Qi sculpture left a deep impression on people with its unique style and momentum.
In the original novel, there was the role of the Northern Qi Princess. In Joy of Life, the Northern Qi Great Princess was the Northern Qi Empress's half-sister. She was the official consort of the Qing Kingdom's Great Prince and Shen Wan 'er's best friend. She was arranged to marry far away in the Qing Kingdom and follow Fan Xian to the Qing Kingdom. Therefore, it could be concluded that there was indeed a role of the Northern Qi Princess in the original novel.
In Joy of Life, the name of the Northern Qi Princess was Li Yunrui. Li Yunrui was one of the rulers of Northern Qi, the mother of the Emperor Zhan Doudou, and also the lover of the male lead, Fan Xian. She was an ambitious and scheming woman who would do anything to gain power.
In the search results provided, there was no clear mention of whether the Northern Qi Great Princess existed in the original work. Therefore, I don't know if the original book had the Northern Qi princess.
In the search results provided, there was information about the Northern Qi Princess in the original work of Joy of Life. According to the search results, there was indeed the existence of the Northern Qi Princess in the original novel. She was the daughter of the Northern Qi Emperor and had married the Great Prince of the Qing Kingdom. She had become the symbol of the marriage alliance between Northern Qi and the Qing Kingdom. She played an important role in the play and interacted with Fan Xian. She also revealed the news that Zhan Doudou was a girl. However, there was no mention of who she married. Therefore, the original novel did have the role of the Northern Qi Princess.
The Book of Northern Qi could be read online.
The author of the Book of Northern Qi was Li Baiyao.
The Book of Northern Qi was written by Li Baiyao, a historian of the Tang Dynasty.
The Northern Qi Book was a work of the Tang Dynasty.