Once you start taxatively naming "these are the Only Blessed Ranges," you'll be bitten by the usual brouhaha "email address ends with .[a-z]{2,3}". We all know how it went, and ".[a-z]{2,4}" didn't cut it, either, not even in 2000.
To add to the complexity, not all Chinese characters in use for names are representable in unicode. Perhaps at some point legal institutions must just define what the list of characters is that people can have as part of their name as listed on documentation. This reminds me of that 'what programmers believe about names' article from a while back.
nuc1e0n|8 months ago
pepa65|8 months ago
bmn__|8 months ago
Why? How do you come to this conclusion?