maptalks - TileLayer of Baidu Projection

TileLayer of Baidu Projection
index.html
<!DOCTYPE html>
<html>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>TileLayer and Geo-Projections - TileLayer of Baidu Projection</title>
  <style type="text/css">
    html,body{margin:0px;height:100%;width:100%}
    .container{width:100%;height:100%}
  </style>
  <link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
  <script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>
  <body>
    <div id="map" class="container"></div>

    <script>
      var map = new maptalks.Map('map', {
        center: [105.08052356963802, 36.04231948670001],
        zoom: 5,
        minZoom:1,
        maxZoom:19,
        spatialReference:{
          projection : 'baidu'
        },
        baseLayer: new maptalks.TileLayer('base', {
          'urlTemplate' : 'https://gss{s}.bdstatic.com/8bo_dTSlRsgBo1vgoIiO_jowehsv/tile/?qt=tile&x={x}&y={y}&z={z}&styles=pl&scaler=1&udt=20170927',
          'subdomains':[0, 1, 2, 3],
          'attribution' :  '&copy; <a target="_blank" href="http://map.baidu.com">Baidu</a>'
        })
      });

    </script>
  </body>
</html>