[qt-Android] App can't render many chinese characters in ONEPLUS phone

App can't render many chinese characters (about 30%) in ONEPLUS phone, lt just draw the chacacter as blank.
The program used to reproduce this problem is attached.
In the past, Qt can render chinese character correctly, but this issue occurred after a system upgrade of the phone. It seems that the font file has changed since then.
I have contacted the developer behind ONEPLUS, they say they have changed font files and we should comply with the new fonts files.

The font files installed in this phone is listed below:

AndroidClock.ttf
AndroidClock_Highlight.ttf
AndroidClock_Solid.ttf
AndroidEmoji.ttf
Chamdo.ttf
Clockopia.ttf
ColorOSUI-Bold.ttf
ColorOSUI-Light.ttf
ColorOSUI-Regular.ttf
ColorOSUI-Thin.ttf
ColorOSUI-XThin.ttf
DroidNaskh-Regular.ttf
DroidNaskhUI-Regular.ttf
DroidSans-Bold.ttf
DroidSans.ttf
DroidSansArmenian.ttf
DroidSansEthiopic-Regular.ttf
DroidSansFallback.ttf
DroidSansFallbackFull_subset.ttf
DroidSansGeorgian.ttf
DroidSansHebrew-Bold.ttf
DroidSansHebrew-Regular.ttf
DroidSansMono.ttf
DroidSans_Subset.ttf
DroidSerif-Bold.ttf
DroidSerif-BoldItalic.ttf
DroidSerif-Italic.ttf
DroidSerif-Regular.ttf
MTLmr3m.ttf
NanumGothic.ttf
NotoColorEmoji.ttf
NotoColorEmojiFallback.ttf
NotoSansBengali-Bold.ttf
NotoSansBengali-Regular.ttf
NotoSansBengaliUI-Bold.ttf
NotoSansBengaliUI-Regular.ttf
NotoSansDevanagari-Bold.ttf
NotoSansDevanagari-Regular.ttf
NotoSansDevanagariUI-Bold.ttf
NotoSansDevanagariUI-Regular.ttf
NotoSansKannada-Bold.ttf
NotoSansKannada-Regular.ttf
NotoSansKannadaUI-Bold.ttf
NotoSansKannadaUI-Regular.ttf
NotoSansKhmer-Bold.ttf
NotoSansKhmer-Regular.ttf
NotoSansKhmerUI-Bold.ttf
NotoSansKhmerUI-Regular.ttf
NotoSansLao-Bold.ttf
NotoSansLao-Regular.ttf
NotoSansLaoUI-Bold.ttf
NotoSansLaoUI-Regular.ttf
NotoSansMalayalam-Bold.ttf
NotoSansMalayalam-Regular.ttf
NotoSansMalayalamUI-Bold.ttf
NotoSansMalayalamUI-Regular.ttf
NotoSansSymbols-Regular.ttf
NotoSansTamil-Bold.ttf
NotoSansTamil-Regular.ttf
NotoSansTamilUI-Bold.ttf
NotoSansTamilUI-Regular.ttf
NotoSansTelugu-Bold.ttf
NotoSansTelugu-Regular.ttf
NotoSansTeluguUI-Bold.ttf
NotoSansTeluguUI-Regular.ttf
NotoSansThai-Bold.ttf
NotoSansThai-Regular.ttf
NotoSansThaiUI-Bold.ttf
NotoSansThaiUI-Regular.ttf
Padauk-book.ttf
Padauk-bookbold.ttf
Roboto-Bold.ttf
Roboto-BoldItalic.ttf
Roboto-Italic.ttf
Roboto-Light.ttf
Roboto-LightItalic.ttf
Roboto-Regular.ttf
Roboto-Thin.ttf
Roboto-ThinItalic.ttf
RobotoCondensed-Bold.ttf
RobotoCondensed-BoldItalic.ttf
RobotoCondensed-Italic.ttf
RobotoCondensed-Regular.ttf