For example, are you asking:
* About a person named Chan? If so, you'd need to provide more information about this person (e.g., their full name, profession, etc.) to determine their nationality.
* About a place called Chan? If so, you'd need to specify what type of place it is (e.g., a city, a village, a region, etc.)
* About a specific concept or term? For example, there's a Korean surname "Chan," but that doesn't tell us which country the surname is found in.
Please give me more details so I can help you!