After Liu Heng ascended the throne, he tried his best to root out Lv Hou's henchmen. Why did he only leave zhangyan?

Liu Heng, the emperor of the Han Dynasty, was emperor by heroes. He has a good political mind. Instead of becoming a puppet emperor, he tried to make the Han Dynasty move towards a period of stability and prosperity. After Emperor Wendi ascended the throne, his first task was to stabilize the political power, so he tried his best to eradicate Lv Hou's henchmen, among whom zhangyan belonged to Lv Hou, but Emperor Wendi spared her. Zhang Yan stayed for the following reasons.

The first one has a lot to do with zhangyan's identity. Zhangyan is the granddaughter of Liu Bang, so she has the blood of Emperor Gaozu, and she is also a justified queen, so there is no reason to deal with zhangyan, whether in public or in private. If Yu Gong killed Zhang Yan, it would be tantamount to denying Hui Di's kingship status, which is not conducive to the stability of Liu Jiangshan. Privately, Liu Bang is related by blood. If Zhang Yan is sentenced to death, it will have an impact on the reputation of Emperor Wendi. It is better to block zhangyan, leave her life and win the reputation of the benevolent king.

The second thing is that Lv Hou's dictatorship has nothing to do with Zhang Yan. It can be said that she was forced to be a victim. Moreover, during her time as the Queen of Hui Di, she didn't do anything bad, so many people felt sorry for zhangyan's life. Therefore, if Emperor Wen of the Han Dynasty grants Zhang Yan the death penalty at this time, it will affect the status of Emperor Wen of the Han Dynasty. Therefore, for Emperor Wendi, the former queen can only be well cared for.

After Emperor Wendi wiped out Lv Hou's henchmen, Zhang Yan no longer posed a threat to Emperor Wendi. Moreover, the young queen is in a difficult situation. She was forced to marry Hui Di and didn't sleep with Hui Di after marriage, so people who know the inside story sympathize with zhangyan.