At forum bbs.duowan.com, there are ways which change region of SysNAND with a valid SecureInfo_A first, then hack it as the normal way of A9LH.
I'm Chinese too, but I bought a JPN N3DS, cause ,you know, there are a few games for TWN/CHN 3DS.
So not tried the methods above. A CHN/TWN/KOR 3DS and...