What is Guomao? It literally means international trade. But why is it Xiamen Guomao? What else is Beijing Guomao? who can explain

Guotuo is generally understood as international trade. But in Beijing, there is a place called Guomao, which is a place name, as well as Guomao Bridge and Guomao Mall. Everyone is accustomed to calling it Guomao, and everyone understands it. As for the Guomao in Xiamen, maybe it is a place name, I don’t know. In fact, there is nothing difficult to understand. It must be combined with the context. But it’s hard to say what the word Guomao means.