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):

loca,
      glyf,
      numGlyphs,
      isGlyphLocationsLong,
      hintsValid,
      dupFirstEntry,
      maxSizeOfInstructions
    ) {
      let itemSize, itemDecode, itemEncode;
      if (isGlyphLocationsLong) {
        itemSize = 4;
        itemDecode = function fontItemDecodeLong(data, offset) {
          return (
            (data[offset] << 24) |
            (data[offset + 1] << 16) |
            (data[offset + 2] << 8) |
            data[offset + 3]
          );
        };
        itemEncode = function fontItemEncodeLong(data, offset, value) {
          data[offset] = (value >>> 24) & 0xff;
          data[offset + 1] = (value >> 16) & 0xff;