Here's a short story:

Hokkien /hɒˈkiɛn/ (traditional Chinese: 福建話; simplified Chinese: 福建话; pinyin: Fújiànhuà; Pe̍h-ōe-jī: Hok-kiàn oē) or Quanzhang (Quanzhou–Zhangzhou / Chinchew–Changchew; BP: Zuánziū–Ziāngziū) is a group of mutually intelligible Min Nan Chinese dialects spoken throughout Southeast Asia, Taiwan, and by many other overseas Chinese. Hokkien originated from a dialect in southern Fujian. It is closely related to the Teochew, though mutual comprehension is difficult, and is somewhat more distantly related to Hainanese. Besides Hokkien, there are also other Min and Hakka dialects in Fujian province, most of which are not mutually intelligible with Hokkien. 

The term Hokkien (福建; hɔk˥˥kɪɛn˨˩) is itself a term not used in Chinese to refer to the dialect, as it simply means Fujian province. In Chinese linguistics, these dialects are known by their classification under the Quanzhang Division (Chinese: 泉漳片; pinyin: Quánzhāng piàn) of Min Nan, which comes from the first characters of the two main Hokkien urban centers Quanzhou and Zhangzhou. The variety is also known by other terms such as the more general Min Nan (traditional Chinese: 閩南語, 閩南話; simplified Chinese: 闽南语, 闽南话; pinyin: Mǐnnányǔ, Mǐnnánhuà; Pe̍h-ōe-jī: Bân-lâm-gí,Bân-lâm-oē) or Southern Min, and Fulaohua (traditional Chinese: 福佬話; simplified Chinese: 福佬话; pinyin: Fúlǎohuà; Pe̍h-ōe-jī: Hō-ló-oē). The term Hokkien (Chinese: 福建話; Pe̍h-ōe-jī: hok-kiàn oē;Tâi-lô:Hok-kiàn-uē), on the other hand, is used commonly in South East Asia to refer to Min-nan dialects. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What is Hokkien?
Guess: a group of Min Nan Chinese dialiects

Question: Where is it used?
Guess: throughout Southeast Asia, Taiwan, and by many other overseas Chinese.

Question: Where is it originated from?
Guess: southern Fujian

Question: Does it have sister languages?
Guess: yes

Question: What are they?
Guess: Teochew and Hainanese.

Question: Do they understand each other?
Guess: mutual comprehension is difficult

Question: When they say Hokkien what they mean in Chinese?
Guess: Fujian province

Now answer the following question in the same format.

Question: How they are classified?

under the Quanzhang Division