vertical-centering-font-regexp

vertical-centering-font-regexp is a variable defined in `C source code'.
Its value is

"gb2312\\|gbk\\|gb18030\\|jisx0208\\|jisx0212\\|ksc5601\\|cns11643\\|big5"

Documentation:
Regexp matching font names that require vertical centering on display.
When a character is displayed with such fonts, the character is displayed
at the vertical center of lines.

You can customize this variable.