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):

properties,
          SEAC_ANALYSIS_ENABLED
        );
        cff = parser.parse();
        cff.duplicateFirstGlyph();
        const compiler = new CFFCompiler(cff);
        tables["CFF "].data = compiler.compile();
      } catch (e) {
        warn("Failed to compile font " + properties.loadedName);
      }
    }
    
    if (!tables.name) {
      tables.name = {
        tag: "name",
        data: createNameTable(this.name),
      };
    } else {
      
      const namePrototype = readNameTable(tables.name);
      tables.name.data = createNameTable(name, namePrototype);
      this.psName = namePrototype[0][6] || null;
    }
    const builder = new OpenTypeFileBuilder(header.version);
    for (const tableTag in tables) {
      builder.addTable(tableTag, tables[tableTag].data);
    }
    return builder.toArray();
  }
  convert(fontName, font, properties) {