...it's just that the character encoding for annabelleigh.net is iso-8859-1 ⚠️ ↗. If you want to use any character not included in this encoding, you have to use HTML entities. Something like this (look at the source code): 小斯韵. In pinyin it's Xiǎo Sīyùn.
You cannot use HTML entities in subject lines (& is automatically converted to +).
And if you use HTML entities in the message body, be careful with preview (hit the back button before posting).
Surf safe;)
NFiH