Useful to print visit card in two languages. Common word in trade? Not very clear about your meaning. You mean which city cost less money to visit? It is hard to say. To get a visa, you should go to handle that in Chinese Embassy in Iran(https://www.travelchinaguide.com/embassy/iran.htm) . Yes, many chain hotels, such as Jinjiang Inn, Home Inn, Motel 168, etc. They have branches in major cities.