Chinese Variant:
Correct Case:

Running...
[Qt Message] Requested font: "Sans MT 936_S60" 16
[Qt Message] Returned font: FontMaxAscent =  16
[Qt Message]                FontMaxDescent =  0
[Qt Message]                MaxCharWidthInPixels =  24

Wrong Case:
Running...
[Qt Message] Requested font: "Sans MT 936_S60" 16
[Qt Message] Returned font: FontMaxAscent =  0
[Qt Message]                FontMaxDescent =  0
[Qt Message]                MaxCharWidthInPixels =  24