After Zhao Kuangyin's successful mutiny, why didn't he kill the royal family of the former dynasty to avoid future trouble? But to protect them and return them to uncle Dan?

People familiar with the history of the Song Dynasty should know in their hearts that Zhao Kuangyin, the founding emperor of the Song Dynasty? He didn't ascend to the throne aboveboard, but he wanted to make an excuse for himself, saying that he was forced to become king by his yellow robes. In fact, many people know that if he didn't secretly plan for a long time, how could he ascend to the throne so easily? If it were that simple, everyone could be an emperor. Is this not a joke? Although Zhao Kuangyin's means to ascend to the throne of the emperor is not aboveboard, we have to admit that he is indeed a benevolent and wise monarch. He didn't hurt the founding fathers, but treated the former royal family with courtesy and gave them precious iron coupons. Many people can't help wondering why Zhao Kuangyin was so friendly to the former royal family. Wouldn't it be better to kill directly to avoid future trouble? In fact, there is a reason for this.

Judging from the fact that Zhao Kuangyin did not slaughter the founding heroes and those who had offended him before after he proclaimed himself emperor, he was actually kind, unlike some emperors who were cruel and murderous in the past. Because of his kindness, he didn't go to the royal family of the last dynasty. Of course, this is only one of the reasons, and the main reason is the one mentioned below.

On the surface, Zhao Kuangyin was forced to proclaim himself emperor by a daze subordinate, but all wise people know that this is just an excuse for him to proclaim himself emperor. In order to block the leisurely crowd, Zhao Kuangyin felt guilty about the royal family of the previous dynasty. It would be unkind if he robbed the family country and wiped out the royal family. It is better to relax your mind, be kind to others and leave a good impression on a wise king in the eyes of everyone. Why not?

As far as people are concerned, Zhao Kuangyin is not afraid of biting the powerful royal family and taking revenge. It's not necessary to take back the country. Since Zhao Kuangyin can be proclaimed himself, he naturally has his own means, and he is not an incompetent person. Didn't he think of that? Since he dares to be so kind to them, it shows that he already has countermeasures to deal with this situation. The emperor's heart is unpredictable.