Joy of Life, the Northern Qi Dynasty is equivalent to the Northern Dynasty in history, and the Southern Qing Dynasty is equivalent to the Southern Dynasty in history. If we sit in the right place according to national strength, the Northern Qi is still the Northern Qi of the Northern Dynasties, while the Qing Dynasty is more like the Northern Zhou of the Northern Dynasties.

It is Li who lives happily in the royal family. In real history, the Northern Zhou Dynasty was replaced by the Sui Dynasty, and the Sui Dynasty was replaced by the Tang Dynasty. The royal family in the Tang Dynasty was Li. The name of Prince Di Qing is Li Chenggan, which is the same as that of Prince Li Chenggan of Emperor Taizong of Li Shimin. It can be seen that in this aerial novel, the background of Love between Life and Death is a mirror image of the history of the Southern and Northern Dynasties and the early years of Sui and Tang Dynasties.

In A Happy Life, the Northern Qi Dynasty (formerly the Northern Wei Dynasty) and the Southern Qing Dynasty formed a pattern of long-term confrontation between the north and the south, corresponding to the northern and southern dynasties in China's history.

The Northern and Southern Dynasties was a period of great division. At that time, those who occupied northern China were called Northern Dynasties, and those who occupied southern China were called Southern Dynasties. It is worth mentioning that the Northern and Southern Dynasties were not fixed dynasties, but were collectively referred to as several regimes.