Python Chinese string interception problem

Let's look at an example:

#-*-Coding:utf8-*-s = U ' Chinese intercept ' s.decode (' UTF8 ') [0:3].encode (' UTF8 ') # result u ' Chinese intercept

Extended reading:

How many bytes does the Chinese character in UTF-8 occupy?
Accounted for 2 bytes: 0
3 bytes: Basically equivalent to GBK, containing more than 21,000 Chinese characters
4 bytes: Chinese, Japanese and Korean characters inside the large character set, there are more than 50,000
A UTF-8 number takes 1 bytes
A UTF-8 English alphabet account of 1 bytes

When looking for UTF-8 encoded data, found that many of the posts said UTF-8 encoding, a Chinese character occupies 3 bytes, and some have done a proof, presumably, to create a non-BOM UTF-8 encoded text file, which saved a few Chinese characters, and then view the size of the file. I don't think this proves to be a bit convincing, because UTF-8 is a long, 1-6 byte, and a small amount of kanji testing doesn't mean that all Chinese characters are true.

Later I looked at the character mapping table-Chinese, found the correct answer, the minority is the Chinese character each occupies 3 bytes, the majority occupies 4 bytes.

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