It is reasonable that he should not be polite to Mongols, but in fact, he is polite, which is very surprising. Here's a little example. When Zhu Yuanzhang killed Aquamarine, he was accused of molesting the Mongolian princess, which led her to commit suicide in shame. This is enough to explain Zhu Yuanzhang's attitude towards Mongolian women.
In fact, Zhu Yuanzhang is also very clever. In doing so, he not only showed the legitimacy of the country, but also reflected the majesty of the emperor.
At that time, after the founding of the People's Republic of China, Zhu Yuanzhang's strategy was clear, that is, while pursuing the Mongolian royal family, he tried to give the Mongols a favor. As long as you return to the Ming Dynasty and obey it, the Ming Dynasty will give you generous treatment and let you live in peace.
Since Zhu Yuanzhang wants to do this, of course he should be kind to Mongolian women.