Yao Chang was repeatedly defeated by Fu Deng, and ordered Yao Chong to attack Fu Deng's baggage in the Great Realm, but he couldn't, and Fu Deng had already threatened stability.

Faced with such a situation, Yao Chang refused to fight head-on with Fu Deng, trying to win by calculation, so he led 30,000 troops to attack the Great Realm again by night, and finally conquered the Great Realm, and killed Empress Fu Deng Mao and others, and captured dozens of famous former Qin generals.

Yao Chang was not greedy for victory, and refused to take advantage of the victory to attack Fu Deng, so Fu Deng collected the rest of the people and retreated to Hukong Fort, but his vitality was greatly damaged.

Fu Deng attacked Anding, and Yao Chang defeated him in the east of Anding.

The following year, Yao Chang fell ill.

After Yao Chang's condition improved, he personally led his troops to resist, and when he took advantage of the camp to meet the attack, he ordered Yao Xilong to attack the former Qin military camp.

Yao Chang also sent the army out to follow Fu Deng, who was even more frightened when he learned that the Houqin camp was empty, and lost his shadow, so he had to return to Yongcheng (now south of Fengxiang County, Shaanxi).

Yao Chang died of illness, and his son Yao Xing was established, and Fu Deng remained a formidable threat to the Later Qin Dynasty.

Yao Shuode had the highest prestige and the strongest troops, and in order to dispel Yao Xing's concerns, he went to Chang'an to express his attitude and recognize Yao Xing's leadership status, thus easing the tension in the Later Qin Dynasty.

If at this time, the three generals who controlled the heavy army of Later Qin, Yao Xu, Yao Shuode, and Yao Chong, the uncle of Zhen'an and Yinmi (now west of Lingtai County, Gansu), and Yao Chong, the younger brother of Chang'an, took the opportunity to launch a mutiny to usurp the throne, it is estimated that there will be nothing to do with Later Qin, and Fu Deng will definitely take the opportunity to attack and restore the country.

However, Yao Xing has a good uncle, too, and the former Qin has become history.

When Fu Deng heard the news of Yao Chang's death, he mobilized his army and marched eastward with all his might, preparing to destroy Hou Qin in one fell swoop.

The two armies fought a decisive battle at the abandoned bridge. In this battle, Hou Qin won a complete victory. Fu Deng's army completely collapsed, and Fu Deng collected the remnants of the horses, fled to Pingliang (present-day Pingliangxi, Gansu), and hid in Mamao Mountain.

Only then did Yao Xing officially mourn for Yao Chang, and he was enthroned as emperor in Huaili near the battlefield.

Later, Yao Xing personally led the army to attack Mamao Mountain, and defeated Fu Deng in one go, and Fu Deng was also defeated and killed in this battle. In order to eradicate the hidden danger, Yao Xing disbanded Fu Deng's subordinates and arranged for them to resume agricultural production.

By 399, Yao Xing began to encroach on the Eastern Jin Dynasty, at this time, the emperor of the Eastern Jin Dynasty was Sima Dezong, who was more stupid than Emperor Hui of the Jin Dynasty, and it was Sima Daozi and Sima Yuanxian father and son who controlled the government.

In the volume of "Overview of the Two Jin Dynasty", it has been said that during this period, the political situation of the Eastern Jin Dynasty was rotten and erosive, and the society was in turmoil.

After leading his troops to break through Luoyang City, north of the Huai River and Hanshui, many local forces were attached to Yao Xing.

Be diligent in political affairs, govern the country and the people. He developed the economy, built water conservancy, cared about agricultural affairs, inherited Yao Chang's policies, vigorously advocated Confucianism, and established schools.

Unified the Guanlong region, realized the three-legged establishment of the Later Qin, Northern Wei and Eastern Jin Dynasty, and became a strong dynasty in the later period of the Sixteen Kingdoms, second only to the Later Yan in national strength.

Emperor Daowu of the Northern Wei Dynasty sent an envoy to propose marriage to Later Qin, but was rejected. Later, the Northern Wei army attacked the Qin subordinate departments such as Dethroned Fu and Suguyan, and since then there has been friction between Qin and Northern Wei.

In 402, Yao Xing officially attacked the Northern Wei Dynasty, and the two armies fought a big battle in the area of Chaibi (now Chaizhuang Village, South 15 Li, Xiangfen County, Shanxi).

Yao Xing took advantage of the "Huanxuan Rebellion" in the Eastern Jin Dynasty to expand his territory to the south and achieved results.

Taking advantage of the fall of the former Qin, there is still Qiu Chi who will restore the country.

Yang Ding, who followed Fu Jian, took the opportunity to return to Longyou, collected the old troops, called himself General Long Xiang and Qiu Chi Gong, recruited Di and Han people to stand on their own, and claimed to the Eastern Jin Dynasty as a vassal and known as the Later Qiu Chi State in history.

Later, Yang Ding fought with the Western Qin beggar and returned to the battle, and was killed in defeat.

After the death of Yang Ding, his cousin Yang Sheng succeeded to the throne, and there were only two cities in Wudu and Yinping in the jurisdiction.

Liu Yu conquered Shu and recovered Hanzhong, the defenders of Qiu Chi were defeated for thousands of miles, evacuated Liangzhou, and then Qiu Chi presented a surrender table, declared himself a minister to Liu Yu, and attached to the Eastern Jin Dynasty.

After being severely injured by Later Qin Yao Xing, he forced Yang Sheng to send his son as a proton and accept Yao Xing's title.

After Yang Sheng's death, his son Yang Xuan succeeded to the throne.

In the early years of the Liu Song Dynasty of the Southern Dynasty, Yang Xuan accepted the canonization of Liu Song and claimed to be a vassal to the Song Dynasty, and later also declared himself a vassal to the Northern Wei Dynasty and accepted the canonization of the Northern Wei Dynasty.

A weak country is not easy to mix......

After Yang Xuan's death, his son Yang Baozong succeeded to the throne, but Yang Xuan's younger brother Yang was difficult to be, and Yang Baozong was abolished and became independent. Yang Nandang tried to make a difference, and he rejuvenated the teacher year after year.

Beginning in 432, Qiuchi suffered from a famine for many years, and in order to get rid of the predicament, Yang Nandang successively sent troops to Liu Song and the Northern Wei Dynasty.

Nine years later, Yang Nandang attacked Liu Song's Yizhou again, and Liu Song sent troops to fight back. Later, the enemy Chi Kingdom was also destroyed in this battle. Yang Nandang defected to the Northern Wei Dynasty.

Maybe it was because he occupied some southern land, and the Later Qiu Chi State was a vassal to Later Qin, and Yao Xing felt a little good about himself.

Under the advocacy and encouragement of Yao Xing, the whole country of Later Qin worshiped Buddhism, and for a time there were many temples and pagodas, and there were more than 5,000 monks in Chang'an alone, and the people who were doing Buddhism in various places reached the point of "ten rooms and nine".

The practice of Buddhism advocated by Yao Xing has consumed a lot of material wealth, exhausted the reserves and used up the people, and seriously affected the further development of the social productive forces in the Guanlong area. Later Qin's national power began to decline and went downhill.

Things must be reversed, no matter how good things are, there must be a degree.

Later, Yao Xing's decision-making mistakes led to the gradual withdrawal of Later Qin's forces from Hexi, and in the same year, Yao Xing made another mistake and returned the twelve counties of Nanxiang to the Eastern Jin Dynasty, greatly weakening his own power.

This was followed by Helian's vigorous rebellion, which was mentioned earlier and will not be repeated here.

Taking advantage of the decline of the Later Qin State, the Hou Qiu Chi State, which was forced to return to obedience, took the opportunity to rebel, Yao Xing sent troops to attack Yang Sheng, but Yang Sheng won more with less and fought back.

In May 414, Yao Xing suddenly fell seriously ill, and the princes began the battle for the throne, and the "Rebellion of the Eight Kings" was staged again, but this time it was more pitiful than the Rebellion of the Eight Kings.

This civil strife, Yao Xing executed Yao Bi and quelled, and after Yao Xing died of illness, the crown prince Yao Hong ascended the throne.

However, at this time in the Eastern Jin Dynasty, there was a Liu Yu.

In the volume of "Overview of the Two Jin Dynasty", when talking about the "Huan Xuan Rebellion", it was mentioned that Liu Yu led his troops to attack Jiankang and beat Huan Xuan, who was the emperor of Jiankang.

In fact, Liu Yu also took the same path as Huan Wen, first establishing merits, such as Pingshu and Pingqiuchi, and now taking advantage of the civil strife in Later Qin and the opportunity of the new emperor to ascend the throne, he came to attack Later Qin again.

Later Qin was still at war with Bactria and Western Qin until the Eastern Jin Dynasty approached Luoyang, the state of Yuzhou.

Such a situation, of course, was not conducive to Later Qin, and the Jin army was at war, which can be described as a gradual defeat and retreat, Yao Hong was forced to surrender, and Later Qin perished, with three masters, thirty-four years.

These emperors have worked hard and conscientiously in the past, how can they see that after the country is stable, they are all relaxed? The time and place are favorable, but the key person has dropped the chain, alas.

Helian Bobo, who established Great Xia, was also recorded as a tyrant by historians.

The Book of Jin contains:

Helian was violent by nature, fond of murder, and had no routine.

He always stood at the head of the city, and put his sword beside him, and killed everyone who felt disgusted and hated, and if the ministers looked at him face to face, they pierced his eyes, and if anyone dared to laugh, he cut off his lips, and said that those who admonished him were slanderers, and cut off his tongue first, and then killed him.

The Hu people and the Han people are restless, and the people are struggling to make a living.

Someone analyzed Helian Bobo's psychology:

The enhancement of military strength and the expansion of the scope of control have enhanced the self-confidence and pride of the Tiefu Xiongnu nation, and at the same time, in the process of advancing southward, the Tiefu Xiongnu have also further contacted and experienced the breadth and profundity of Han culture, so they have shown a kind of unconfident cowardice.

As the nomads continued to penetrate into the agricultural areas, the advantages of farming culture were increasingly felt by the nomads who migrated south. Out of their yearning for agrarian culture and political needs, ethnic minorities who migrated inward invariably adopted various measures to absorb Han culture in many aspects such as politics, economy, and culture.