LOL @vitaly it gets even better. In this wikipedia page:
link: https://zh.wikipedia.org/wiki/（
the link takes you to the page for the character （, which is called 括号 in Chinese. This is the double width character for (.
Current behavior of linkify seems to be okay. I find myself literally doing the information theoretic practice of trying to figure out “which case is more common”, and the Chinese wikipedia tilted this balance in favor of allowing Chinese characters in link parsing right away.