helloworld example can't render some .pdf that include chinese character

it fails to render chinese character on canvas but its okay to open the file with official pdf.js viewer

helloworld example

pdf.js viewer

import React, { Component } from 'react'
import { AutoSizer, List } from 'react-virtualized'

class Page extends Component {
  componentDidMount() {
    this.renderPDF()
  }

  renderPDF = async () => {
    const { pdf, pageNumber, pageWidth, pageHeight, scale, } = this.props
    const page = await pdf.getPage(pageNumber)
    const viewport = page.getViewport(scale)
    const canvas = this.refs.page
    const context = canvas.getContext('2d')
    canvas.height = viewport.height
    canvas.width = viewport.width
    page.render({
      canvasContext: context,
      viewport: viewport,
    })
  }

  render() {
    const { index, style, } = this.props
    return (
      <div className='watermark-layer' key={index} style={style}>
        <canvas ref='page'></canvas>
      </div>
    )
  }
}

export default class PDFViewer extends Component {
  state = {
    pdf: null,
    numPages: 0,
    pageWidth: 0,
    pageHeight: 0,
    scale: 0,
  }

  style = {
    minHeight: '100vh',
  }

  async componentDidMount() {
    const { file } = this.props
    const pdf = await PDFJS.getDocument(file)
    const { numPages } = pdf
    const { pageWidth, pageHeight, scale } = await this.getSize(pdf)
    this.setState({ pdf, numPages, pageWidth, pageHeight, scale, })
  }

  getSize = async (pdf, full) => {
    const page = await pdf.getPage(1)
    const { width, height } = page.getViewport(1)
    const { pdfdiv } = this.refs
    let pageWidth, pageHeight, scale

    if (full) {
      pageWidth = pdfdiv.clientWidth
      pageHeight = pageWidth * height /  width
      scale = pageWidth / width
    } else {
      pageHeight = pdfdiv.clientHeight
      pageWidth = pageHeight * width / height
      scale = pageWidth / width
    }

    return {
      pageWidth,
      pageHeight,
      scale,
    }
  }

  render() {
    const { pdf, numPages, pageWidth, pageHeight, scale, } = this.state
    return (
      <div ref='pdfdiv' style={this.style}>
        <List
          style={{ margin: '0 auto' }}
          width={pageWidth}
          height={pageHeight}
          rowHeight={pageHeight}
          rowCount={numPages}
          rowRenderer={({ index, style, }) => {
            return (
              <Page
                key={index}
                index={index}
                style={style}
                pdf={pdf}
                pageNumber={index + 1}
                pageWidth={pageWidth}
                pageHeight={pageHeight}
                scale={scale}
              />
            )
          }}
        />
      </div>
    )
  }
}

[crapthings]

working

<script src='https://cdn.jsdelivr.net/npm/pdfjs-dist@2.0.288/build/pdf.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/pdfjs-dist@2.0.288/build/pdf.worker.min.js'></script>

PDFJS.cMapUrl = 'https://cdn.jsdelivr.net/npm/pdfjs-dist@2.0.288/cmaps/' // include "/"
PDFJS.cMapPacked = true // set cMapPacked = true to ignore Warning: Ignoring invalid character "121" in hex string

[vantuanprimelabo]

cMapUrl

How to import Cmaps in locally. Please help me.