Why the \p{Han} can't match Chinese in my Vim?

https://re2.googlecode.com/hg/doc/syntax.html

I read the article and find a way to match the Chinese in vim, but it doesn't work here. What's wrong with it?

Vim support the perl regex, and I tried the `\v\p{Han}` consider the `magic`, but it doesn't work either.

How can I fix it?
Tnx.

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