There are fifteen emperors in Sima family, which are divided into two periods: the Western Jin Dynasty and the Eastern Jin Dynasty. The Western Jin Dynasty was one of the unified dynasties in the history of China, and the Eastern Jin Dynasty was one of the six dynasties. Fifteen emperors (Sima family) were handed down in the Jin Dynasty, totaling 155 years. Later, it was overthrown by Song Wudi. Later, it established the Southern Song Dynasty (also known as Liu Song) and built its capital as Jiankang. Since then, it has entered the Southern and Northern Dynasties.

Extended data:

The Southern Song Dynasty (420-479) was the first dynasty in the Southern Dynasties in China, and it was also the dynasty with the longest existence, the largest territory and the strongest national strength in the Southern Dynasties and the Four Dynasties. A total of four generations, after nine emperors, enjoyed the country for 60 years. Because the monarch's surname is Liu, and because it is different from the later Song Dynasty, it is called Liu. According to the theory that the five virtues begin at the end, it is called water virtue, so it is also called water song.

Emperor Wu of Song rose in the troubled times at the end of the Eastern Jin Dynasty, and successively pacified Sun En, Huan Xuan, Liu Yi, Lu Xun, Sima Xiuzhi and other forces, and destroyed Huanchu, Xishu, Southern Yan, Houqin and other countries. Not only unified the south of China, but also recovered Shandong, Henan, Guanzhong and other places. Finally, it was built in Jin and Song Dynasties, with its capital in Jiankang (now Nanjing).

In the early period of Liu and Song Dynasties, when the society was stable, before and after Emperor Wu of Song ascended the throne, he vigorously carried out reforms, concentrated power, suppressed the merger of powerful countries, broke the land, cracked down on the elites of powerful countries, rectified the bureaucracy, reused the poor, developed production, lavished wealth, abolished harsh laws, tried lawsuits in person, revitalized education, tried out scholars in various counties, raised virtuous people, and sent envoys to visit the people's sufferings many times.

After the death of Emperor Wu of Song, Liu Yilong, Song Wendi continued to implement Emperor Wu of Song's general plan of governing the country, which was called "the rule of Yuan Jia" in history. However, due to the failure of Wendi's Northern Expedition in his later years, his national strength was greatly damaged. In the late Liu and Song Dynasties, the government was chaotic and emperors changed frequently. In 479 AD, it was replaced by a powerful minister, Xiao Daocheng, who established Nanqi, and Liu Song perished.

Liu Song Dynasty was the first dynasty established by poor civilians in Wei, Jin, Southern and Northern Dynasties. During this period, a number of influential figures such as Xie Lingyun, Ye Fan, Zu Chongzhi and He Chengtian appeared. The history of Jiankang literature reached its peak in this period, and famous works such as Shi Shuo Xin Yu and Hou were born in this period, which had a far-reaching influence on later generations.

References:

Baidu Encyclopedia-Liu Song