The Han surname is Han, and the Manchu surname seems to be that or that. My hometown is Ulanhot, Inner Mongolia. I wonder if the national flag is inlaid with blue.

It is also possible. Maybe your ancestors were the Eight Banners stationed in Guangdong, that is, the Manchu soldiers stationed in Guangdong in the Qing Dynasty. Another possibility is that your ancestors were the Eight Banners Han Army, that is, Han soldiers recruited from the south in the early Qing Dynasty, and later they were incorporated into the Eight Banners, and after a long time they were incorporated into the Manchu Dynasty. Since the family legend is the blue flag, there is probably no problem. Because there is no need for your grandfather or great-grandfather to deceive his grandson on this issue. As for whether it is true blue or inlaid blue, you have to check your local files of the Eight Banners garrison in the Qing Dynasty, where there should be records. You can't ask such a question, because first of all, no one knows you online, and no one knows who you are. You don't say where your home is. If you don't give any clues, others can't help you check.