Wrong display: https://imgse.com/i/xXc0Qe

Correct display: https://imgse.com/i/xjJ1mD

You can see the characters: “探”、“将”、“关”

I use Okular + poppler-data

```
$ pdffonts 1.pdf | iconv -f gbk
name                                 type              encoding         emb sub uni object ID
------------------------------------ ----------------- ---------------- --- --- --- ---------
方正书宋简体                         CID TrueType      GBK-EUC-H        no  no  no     227  0
方正书宋_GBK                         CID TrueType      GBK-EUC-H        no  no  no      64  0
方正黑体_GBK                         CID TrueType      GBK-EUC-H        no  no  no     102  0
方正楷体_GBK                         CID TrueType      GBK-EUC-H        no  no  no      65  0
DY1+ZKWGVK-1                         Type 1            Custom           yes no  yes     66  0
DY2+ZKWGVK-2                         Type 1            Custom           yes no  yes     67  0
DY3+ZKWGVK-3                         Type 1            Custom           yes no  yes    228  0
DY4+ZKWGVK-4                         Type 1            Custom           yes no  yes    229  0
DY5+ZKWGVK-5                         Type 1            Custom           yes no  yes    230  0
DY6+ZKWGVK-6                         Type 1            Custom           yes no  yes     69  0
DY7+ZKWGVK-7                         Type 1            Custom           yes no  yes    104  0
DY8+ZKWGVK-8                         Type 1            Custom           yes no  yes    131  0
DY9+ZKWGVL-9                         Type 1            Custom           yes no  yes    219  0
DY10+ZKWGVL-10                       Type 1            Custom           yes no  yes    211  0
DY11+ZKWGVN-11                       Type 1            Custom           yes no  yes    183  0
DY12+ZKWGVN-12                       Type 1            Custom           yes no  yes    203  0
DY13+ZKWGVO-13                       Type 1            Custom           yes no  yes    194  0
DY14+ZKWGVO-14                       Type 1            Custom           yes no  yes    182  0
DY15+ZKWGVP-15                       Type 1            Custom           yes no  yes    172  0
DY16+ZKWGVP-16                       Type 1            Custom           yes no  yes    163  0
DY17+ZKWGVQ-17                       Type 1            Custom           yes no  yes    155  0
DY18+ZKWGVR-18                       Type 1            Custom           yes no  yes    145  0
DY19+ZKWGVS-19                       Type 1            Custom           yes no  yes    130  0
DY20+ZKWGVT-20                       Type 1            Custom           yes no  yes    120  0
DY21+ZKWGVT-21                       Type 1            Custom           yes no  yes    103  0
DY22+ZKWGVT-22                       Type 1            Custom           yes no  yes    105  0
DY23+ZKWGVT-23                       Type 1            Custom           yes no  yes     96  0
DY24+ZKWGVT-24                       Type 1            Custom           yes no  yes     68  0
DY25+ZKWGVT-25                       Type 1            Custom           yes no  yes     70  0
```

PDF: https://pb.nichi.co/unveil-laptop-foil

It used Noto Sans CJK SC as a substitute

https://imgse.com/i/xXjE3F

but:

1. this is not SC (simplified Chinese) glyphs
2. I set SC higher than JP in `/etc/fonts/conf.d/64-language-selector-prefer.conf`