The iron hat king is the common name of the hereditary monarch in Qing Dynasty. There were twelve iron hat kings throughout the Qing Dynasty. After the establishment of the Qing Dynasty, a whole set of title system was established, and the royal title was one of the components of this system. At that time, there were twelve royal titles, namely Prince Heshuo, King Duoluo County, Duoluo Baylor, Beizi Gushan, lord protector Fengen Town, lord protector Fengen Town, General Zhenguo Town, General Fengen Town, General Guo Feng and General Fengen Town. There are generally two kinds of titles in Qing Dynasty. One is because of the meritorious service of his subjects in the war, which is called meritorious service; The other is the jade seal (which must be sealed under normal circumstances), which is called the Enxi. Descendants of the twelve kings of the Qing Dynasty do not need to be demoted to inherit the title. As a reward for their contribution, they are called the iron hat kings.
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