Liu Heng's main reason for playing dumb is to avoid Lv Hou's suspicion, which is his instinct to save himself. Moreover, he followed his mother to believe in Huang Lao's technology, and he didn't argue or grab things. Therefore, among the princes at that time, Lv Hou thought that Liu Heng was the least threatening, so he saved his life. But how deep is Liu Heng's calculation?

1. Li Wei. When Liu Heng was confirmed as emperor, even Liu Heng didn't believe him. Therefore, when he went to Chang 'an, he sent someone to Chang 'an to find out the news first, and then set off after confirming that it was correct, which was enough to show his caution.

After Liu Heng became emperor, ministers at that time didn't see how capable he was, but later, one by one, ministers woke up. Liu Heng first reuse frequency, using frequency to attack others.

At first, frequency didn't know it was the use of Emperor China. Because Zhou Bo thinks he has contributed to Liu Heng and is arrogant to Liu Heng, he doesn't take Liu Heng seriously every time he leaves North Korea. On the other hand, Liu Heng respected him and often watched the frequency leave.

The minister thought that it was beneath the emperor's dignity for Liu Heng to show such respect for frequency, but Liu Heng was very unhappy. Zhou Bo's men also advised him not to be self-righteous, or Lord Gao Zhen would be punished. Frequency this just suddenly enlighted, hurriedly resigned as prime minister.

Later, it was reported that Zhou Bo was going to rebel. Because frequency took preventive measures and left no evidence, Liu Heng's investigation found no evidence, and frequency survived.

In order to consolidate its power, Liu Heng tried to master military power and sent its own people to important positions to prevent people from using the army to carry out rebellion.

2. Use the plan. When Liu Heng took office, the biggest foreign invasion he faced was Zhao Tuo in the south. This man wanted to stand on his own feet as emperor during Liu Bang's time. During the civil strife in the Han Dynasty, especially after Liu Heng succeeded to the throne, Zhao Tuo didn't take Liu Heng seriously at all, so he thought the time was ripe.

In BC 18 1 year, Zhao Tuo destroyed Anyang State, and Nanyue State expanded to northern and central Vietnam, keeping pace with the Han Dynasty.

Liu Heng was in a hurry, but it didn't help. How did so many troops go to Zhao Tuo in the Han Dynasty? At this time, his ministers didn't know what to do, so Liu Heng adopted the technique of Huang Lao taught by his mother and decided to write a letter to Zhao Tuo. The North Korean minister was a little confused by Liu Heng's naive idea that writing letters was worse than fighting?

Zhao Tuo didn't care too much after receiving Liu Heng's letter. He thought it was Liu Heng's letter to scare him, but when he read the contents of the letter, he was surprised.

Liu Heng said to Zhao Tuo in a modest tone in his letter that the court had sent two border generals to protect Zhao Tuo's relatives in the north, and also sent someone to repair Zhao Tuo's ancestral grave.

The more Zhao Tuo read, the more he felt the weight of this letter. Although the tone was slow, every sentence stabbed Zhao Tuo's heart like a knife. Liu Heng also said in his letter that this war will waste people and money. The last sentence is the most important. Liu Heng said: The emissary of Zhao Tuo is very old, but he lives comfortably under the command of the imperial court.

Zhao Tuo lamented that the Liu family had another formidable emperor. If he doesn't know what to do, he will surely be destroyed. So I wrote a letter to Liu Heng in a gentler tone, expressing my willingness to be a vassal and live in peace.

Later generations praised Liu Heng for destroying the Zhao Tuo insurrection with a letter, which is the origin of "half the country is a piece of paper" in history. Is Zhao Tuo really convinced? Not necessarily, but Zhao Tuo also felt that the war was against him. He used Liu Heng's letter to find a step and continue to rule South Vietnam. There is only one word difference between the emperor and the king.

3. Liu Heng was unstable during his reign. In addition to Zhao Tuo in the south, Xiongnu in the north is also a big problem facing Liu Heng. However, during the reign of Liu Heng, in order to strengthen the Han Dynasty, he took restraint and patience measures against the Huns. At the same time, Liu Heng also actively reclaimed land and guarded its borders.

Minister Chao Cuo suggested that Liu Heng adopt "recruiting people to strengthen the border": building cities in the border areas, and then recruiting mainlanders to move to the border areas, and guarding the border while farming. In addition, more than 1000 residents who moved to each city were given farm tools, food and clothes by the court until they became self-sufficient. The people who moved to the border actively responded to the invasion of Xiongnu at the border according to the training organized by the Han army.

This countermeasure has a positive way: whoever can recapture the wealth plundered by the Huns, the court will give him half. Liu Heng was very happy after seeing this policy, and immediately approved its implementation. He also established 36 horse farms in the border areas, mainly in the north and west, sent 30,000 government slaves and raised 300,000 horses, and formulated incentives to reward farmers, so that the number of horses fully met the requirements of border operations.

After the Han Dynasty took a series of measures to defend the border and prepare for war in Liu Heng, it changed the previous system of single rotation of troops, which not only developed the border, but also enhanced the strength of fighting against Xiongnu. The simultaneous recuperation and preparation for war, coupled with the rapid economic development in the Han Dynasty, laid a sufficient foundation for Liang Wudi to attack the Huns thoroughly.

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