Attach (recommended) or Link to PDF file here:
[chinese.pdf](https://github.com/mozilla/pdf.js/files/6404389/download.1.pdf)

Configuration:
- Web browser and its version:90.0.4430.93
- Operating system and its version: mac 10.15.5
- PDF.js version: 2.9.146
- Is a browser extension:no

Steps to reproduce the problem:
1. The Chinese in the attachment cannot be rendered

Brower ✅
![image](https://user-images.githubusercontent.com/13477114/116678074-81782a00-a9db-11eb-8719-74f48fcebc2b.png)

PDF.js ❌ [https://mozilla.github.io/pdf.js/web/viewer.html](https://mozilla.github.io/pdf.js/web/viewer.html)
![image](https://user-images.githubusercontent.com/13477114/116678212-a371ac80-a9db-11eb-847f-dd1ad7752c13.png)


What is the expected behavior? (add screenshot)
**The Chinese character can be rendered**
What went wrong? (add screenshot)
**All of the Chinese character cannot be rendered**
Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

isTrueType
    ) {
      const { scaleFactors } = properties;
      const isGlyphLocationsLong = int16(
        tables.head.data[50],
        tables.head.data[51]
      );
      const glyphs = new GlyfTable({
        glyfTable: tables.glyf.data,
        isGlyphLocationsLong,
        locaTable: tables.loca.data,
        numGlyphs,
      });
      glyphs.scale(scaleFactors);
      const { glyf, loca, isLocationLong } = glyphs.write();
      tables.glyf.data = glyf;
      tables.loca.data = loca;
      if (isLocationLong !== !!isGlyphLocationsLong) {
        tables.head.data[50] = 0;
        tables.head.data[51] = isLocationLong ? 1 : 0;
      }
      const metrics = tables.hmtx.data;
      for (let i = 0; i < numGlyphs; i++) {
        const j = 4 * i;
        const advanceWidth = Math.round(
          scaleFactors[i] * int16(metrics[j], metrics[j + 1])
        );
        metrics[j] = (advanceWidth >> 8) & 0xff;
        metrics[j + 1] = advanceWidth & 0xff;
        const lsb = Math.round(