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):

return;
    }
    
    
    
    [type, subtype] = getFontFileType(file, properties);
    if (type !== this.type || subtype !== this.subtype) {
      info(
        "Inconsistent font file Type/SubType, expected: " +
          `${this.type}/${this.subtype} but found: ${type}/${subtype}.`
      );
    }
    let data;
    try {
      switch (type) {
        case "MMType1":
          info("MMType1 font (" + name + "), falling back to Type1.");
        
        case "Type1":
        case "CIDFontType0":
          this.mimetype = "font/opentype";
          const cff =
            subtype === "Type1C" || subtype === "CIDFontType0C"
              ? new CFFFont(file, properties)
              : new Type1Font(name, file, properties);
          adjustWidths(properties);
          
          data = this.convert(name, cff, properties);
          break;
        case "OpenType":