How can I match a string with only Chinese letters using a regex?

Question

I want to get a regex which can only match a string consisted of Chinese character and without English or any other character. [\u4e00-\u9fa5] doesn't work at all, and [^x00-xff] would match the situation with punctuate or other language character.

boost::wregex reg(L"\\w*");
bool b = boost::regex_match(L"我a", reg);    // expected to be false
b = boost::regex_match(L"我,", reg);         // expected to be false
b = boost::regex_match(L"我", reg);          // expected to be true

Answer 1

The following regex works fine.

boost::wregex reg(L"^[\u4e00-\u9fa5]+");