Erhua no relation Taiwanese Mandarin
Erhua (simplified Chinese: 儿化; traditional Chinese: 兒化; pinyin: érhuà [ɚ˧˥xwä˥˩]); also called erization or rhotacization of syllable finals) is a phonological process that adds r-coloring or the "er" (注音：ㄦ, common words: 耳、尔、儿) sound (transcribed in IPA as [ɚ]) to syllables in spoken Mandarin Chinese. Erhuayin (simplified Chinese: 儿化音; traditional Chinese: 兒化音; pinyin: érhuàyīn) is the pronunciation of "er" after rhotacization of syllable finals.
It is most common in the speech varieties of North China, especially in the Beijing dialect, as a diminutive suffix for nouns, though some dialects also use it for other grammatical purposes.  The Standard Chinese spoken in government-produced educational and examination recordings features erhua to some extent, as in 哪儿 nǎr ("where"), 一点儿 yìdiǎnr ("a little"), and 好玩儿 hǎowánr ("fun"). Colloquial speech in many northern dialects has more extensive erhua than the standardized language. Southwestern Mandarin dialects such as those of  Chongqing and Chengdu also have erhua. By contrast, many Southern Chinese who speak their own languages may have difficulty pronouncing the sound or may simply prefer not to pronounce it, and usually avoid words with erhua when speaking Standard Chinese; for example, the three examples listed above may be replaced with the synonyms 哪里 nǎlǐ, 一点 yìdiǎn, 好玩 hǎowán. Furthermore, Erhua is extremely rare or absent in Taiwanese Mandarin speakers.Only a small number of words in standardized Mandarin, such as 二 èr "two" and 耳 ěr "ear", have r-colored vowels that do not result from the erhua process. All of the non-erhua r-colored syllables have no initial consonant, and are traditionally pronounced [ɚ] in Beijing dialect and in conservative/old Standard Mandarin varieties. In the recent decades, the vowel in the toned syllable "er" has been lowered in many accents, making the syllable come to approach or acquire a quality like "ar" (i.e. [äʵ] with the appropriate tone).
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