Does the text in UTF-8 encoding contain 3 bytes or not?

As described in this topic, are there any UTF-8 encoded Chinese characters whose byte length is not 3 (2 or 4 )? As described in this topic, are there any UTF-8 encoded Chinese characters whose byte length is not 3 (2 or 4 )?

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As described in this topic, are there any UTF-8 encoded Chinese characters whose byte length is not 3 (2 or 4 )?

Of 2 bytes:

3 bytes: basically equivalent to GBK, containing more than 21000 Chinese Characters

Four bytes: Chinese characters in the Chinese-Japanese character set, with more than 50 thousand characters

One utf8 digit occupies 1 byte

One utf8 English letter occupies 1 byte

From: http://blog.csdn.net/chummyhe89/article/details/7777613