It is said that Cao, Liu and Sun are three kingdoms. After half a century's struggle, in 253 AD, the State of Wei destroyed Shu, but by this time, the Cao Wei regime had essentially fallen into the hands of Sima.
In 265 AD, Dai Wei proclaimed himself emperor, made Luoyang its capital, and established the Jin Dynasty, known as the Western Jin Dynasty in history. The Western Jin Dynasty unified the whole country in 280 AD.
Shortly after the death of Sima Yan, the Emperor Wu of the Jin Dynasty, the "Eight Kings Rebellion" broke out, which lasted 16 years, exhausted the national strength of the Western Jin Dynasty, and the domestic people revolted against tyranny. The Huns and Xianbei people outside the region also focused on the rule of the Western Jin Dynasty.
The Western Jin Dynasty was a regime with aristocratic groups as its core interests. Yuwen family was an aristocratic family at that time, holding heavy power in the court and having many diners.
During the Cao Wei period, the "Nine-grade Zheng Zhi System" was formulated. With the evolution of time, it has changed its taste and changed considerably, and it has become an important tool to cultivate the private power of the gate valve, resulting in a situation of "no poverty for the top grade and no gentry for the bottom grade". Powerful forces have developed, the contradiction between gentry and civilians has been expanding, and the infighting between gentry and tribes has been escalating. You can see Prince, Prince Huai, Prince Yue and so on in TV series.
The ruling power of the Western Jin Dynasty was severely weakened under the influence of the gentry.
In 3 16 AD, the Xiongnu led the troops to attack Chang 'an, captured the emperor of the Western Jin Dynasty at that time, and the Western Jin Dynasty perished. Since then, China has entered a war-torn period of more than 200 years, and ordinary people have lived like slaves.
The Western Jin Dynasty perished. In 3 17 AD, Si Marui moved south to avoid the war, rebuilt the Jin Dynasty, and built its capital as Jiankang (now Nanjing, Jiangsu), which was called the Eastern Jin Dynasty in history. After the Eastern Jin Dynasty, Emperor Wu of Song abolished the Jin Emperor, the Eastern Jin Dynasty ended and the Southern Dynasties began.
At this time, there were "five lakes and sixteen countries" and the northern regime in the north. From the end of the Western Jin Dynasty to the Northern Wei Dynasty, five ethnic minorities, mainly Xiongnu, Jiejie, Bianqiang and Qiang, successively established sixteen regimes, including,, Nanliang, Beiliang, Houzhao, Qianqin, Houqin, Xiqin, Houyan, Southern Yan, Beiyan, Xia and Han Cheng, which are known as the "Big Five" in history.
In the Wuhu era, short-lived dynasties were established, each fighting for fame.
In 439 AD, the Xianbei nationality unified the northern countries in the Yellow River valley and established the Northern Wei Dynasty. Soon after, the Northern Wei Dynasty split into the Eastern Wei Dynasty and the Western Wei Dynasty.
As I said before, the Yuwen family has always been a political family at that time, with great power and many guests at home. This laid the foundation for them to win the world.
In 550 AD, the Eastern Wei Dynasty was replaced by Gao Huan and the Northern Qi Dynasty was established.
In 557 AD, the Western Wei Dynasty was replaced by Yu Wenxuan, and the Northern Zhou Dynasty was established. At that time, Yu of the Northern Zhou Dynasty rose up, wiped out the Northern Qi Dynasty and unified the northern land of China.