According to relevant information, it is not illegal to hang the Iron Blood Eighteen-Star Flag. However, with the permission of the state, the Iron Blood Eighteen-Star Flag, referred to as the Eighteen-Star Flag for short, is also called the Iron Blood Flag, the Nine-Horn Flag, the Nineteen-Horn Eighteen-Star Flag and the First Righteousness Flag. It is a symbol of the victory of Wuchang Uprising. Symbolizes the spirit of iron and blood; Eighteen stars are eighteen provinces in Han Dynasty, representing the whole country. For specific information, please pay attention to official website for first-hand authoritative information.