Here's why:
* Last names are not always indicative of nationality. They can be adopted, changed, or passed down through generations, making it difficult to track their origins.
* "Far hang" is not a common last name. This makes it even more difficult to determine its origin.
* There are many diverse cultures and ethnicities around the world. A last name could be found in multiple places, and it's impossible to know definitively where it originated.
If you're interested in learning more about a specific person with the last name "Far hang," you would need to gather more information about them, such as their place of birth, cultural background, or family history.