unicode-fonts help needed

Question

Any experts in the unicode-fonts package out there?

What I am trying to do is set the font for CJK characters and not use the default.

This seems very tough! Using the customize interface injected the usual mumbo jumbo into my .emacs file which I edited by hand to put my preferred font first in the appropriate block.

Source Han Serif SC is the font I want to use:-

'(unicode-fonts-block-font-mapping
;; blah blah
     ("CJK Compatibility"
      ("Source Han Serif SC" "SimHei" "FangSong" "SimSun" "MingLiU" "Meiryo" "Microsoft JhengHei" "Microsoft JhengHei UI" "Lantinghei SC" "Lantinghei TC" "HAN NOM A" "Arial Unicode MS" "WenQuanYi Zen Hei
;; blah blah

When Emacs reloads This change was reflected in the UI but the original font is still used for these characters.

I can get my preferred font to work if I crow bar it using set-fontset-font...

Has anybody got this to work in unicode-font?

I don't want to give up on this package because it seems very popular but there seems to be a paucity of tutorial information about it!

To illustrate this; I type the first character of the "CJK Compatibility" block: "㌀". Then type "Ctrl+U+X =" to get the character information. This is the truncated output:-

            character: ㌀ (displayed as ㌀) (codepoint 13056, #o31400, #x3300)
          charset: unicode-bmp (Unicode Basic Multilingual Plane (U+0000..U+FFFF))
          code point in charset: 0x3300
           script: han
           syntax: w    which means: word
         category: .:Base, L:Left-to-right (strong), |:line breakable
         to input: type "C-x 8 RET 3300" or "C-x 8 RET SQUARE APAATO"
          display: by this font (glyph code)
xft:-PfEd-HanaMinA-normal-normal-normal-*-42-*-*-*-d-0-iso10646-1 (#x15E3)

I would not expect the font to be HanaMinA. I would expect it to be Source Han Serif SC.

I think there is something fundamentally wrong in my understanding of how to over-ride the unicode-fonts defaults!