Why did Emperor Chongzhen say that Yuan Chonghuan and Huang Taiji had a "secret agreement"?

Huang Taiji launched his own misfortune, which made the Ming court furious and finally killed Yuan Chonghuan. Many people think that this is a "double spy" successfully implemented by Huang Taiji in order to get rid of his old enemy. Is that really the case?

From A.D. 1629 to A.D. 65438 to A.D. 10, Huang Taiji led an army, bypassed the original sphere of influence of Chahar Mongols, crossed the Ming territory from Longjingguan, Hongshankou and Daankou via Horqin Grassland, captured Zunhua, a major town of the Ming Dynasty, and immediately led the Eight Banners fighters to the capital. The Ming Dynasty was forced to declare martial law in the capital and wrote a letter to the whole country.

One year before the change of Keith, Huang Taiji continued to fight against the Mongols in Chahar on a large scale, forcing Khan to withdraw from the Xilamulun River, and opened up a route to avoid the defense of Shanhaiguan and go straight to the capital. It can be seen that the change of Keith is not a whim of Huang Taiji, but a long-planned one. So what is the purpose of Huang taiji's regime change?

To say that Huang Taiji wanted to win the capital in one fell swoop, the latter did not have the strength to annex the Ming empire at this time. Even if you capture the capital in a short time, you can't stick to it, and it has no practical significance at all. It is even more unwise to say that it is robbing resources. After all, it's so deep, the transportation of looting becomes a problem, which is more likely to attract a large number of encirclement and suppression by the Ming army, with great risks and high costs. It is necessary to open the passage between Shanhaiguan and Liaoshen in the opposite direction, but Huang Taiji's actions in their nest did not mean to divide his troops and attack Ningyuan at all.

In A.D. 1626, Huang Taiji ascended the throne, and Yuan Chonghuan sent someone to Shengjing to make peace with him. At that time, the peasant uprising in northern Shaanxi had not hurt Daming, and the Ming court was very exclusive to the peace talks. In order to make peace with the latter, Yuan Chonghuan killed Mao according to the latter's conditions, which made the containment force behind the latter completely lost, weakened the defense force of Liaodong, and Yuan Chonghuan was polluted. 1929, Huang taiji sent envoys to Yuan Chonghuan to resume peace talks, which made Yuan Chonghuan even more at the forefront, and the Ming Dynasty was dissatisfied and suspicious.

From this perspective, Huang Taiji began his own change and became the last straw to crush the camel, which led to Yuan Chonghuan's conviction and murder. However, this is unpredictable for Huang Taiji, and he is not sure that Yuan Chonghuan will be killed. Therefore, it is meaningless for Huang taiji to launch his own changes just to implement double agents.

At this time, Yuan Chonghuan returned to Li's, but his actions were very strange. When Huang Taiji left, he chased him, and when Huang Taiji stopped, he stopped. When he arrived in Beijing, Yuan Chonghuan repeatedly asked for troops to enter the city, but they were all rejected. Some people think that Yuan Chonghuan is a traitor. After he entered Beijing, he cooperated with the latter and won the capital. If this is the purpose of Huang Taiji, then this plan also failed, and Yuan Jun finally failed to enter Beijing.

Before the change of Keith, Huang taiji drove away the Chahar Department in the west, and forced North Korea in the east to sign the Jiangdu Peace Treaty, leaving Daming in the south as the real place to fight. In fact, many people forget that when Huang Taiji was fighting for the position of Khan, he had to compromise and his power was limited in order to get the support of other forces. With unprecedented victory to increase their prestige and consolidate their sweat, this is the real purpose of Huang taiji's regime change.