如何在Openlayers上以较低分辨率渲染大于最大缩放比例的Bing地图切片

var bingLayer = new ol.layer.Tile({
  source: new ol.source.BingMaps({
    key: 'YourBingMapsAPIKey',
    imagerySet: 'Aerial', // 设置地图类型，可选值包括Aerial、AerialWithLabels、Road等
  }),
});

var view = new ol.View({
  maxZoom: 18, // 设置最大缩放级别
});

var resolutions = [
  156543.03392804097,
  78271.51696402048,
  39135.75848201024,
  19567.87924100512,
  9783.93962050256,
  4891.96981025128,
  2445.98490512564,
  1222.99245256282,
  611.49622628141,
  305.748113140705,
  152.8740565703525,
  76.43702828517625,
  38.21851414258813,
  19.109257071294063,
  9.554628535647032,
  4.777314267823516,
  2.388657133911758,
  1.194328566955879,
  0.5971642834779395,
  0.29858214173896974,
  0.14929107086948487,
  0.07464553543474244,
  0.03732276771737122,
  0.01866138385868561,
  0.009330691929342804,
  0.004665345964671402,
  0.002332672982335701,
  0.0011663364911678506,
  0.0005831682455839253,
  0.00029158412279196264,
  0.00014579206139598132,
  0.00007289603069799066,
  0.00003644801534899533,
  0.000018224007674497665,
  0.000009112003837248832,
  0.000004556001918624416,
  0.000002278000959312208,
  0.000001139000479656104,
  0.000000569500239828052,
  0.000000284750119914026,
  0.000000142375059957013,
  0.000000071187529978506,
  0.000000035593764989253,
  0.000000017796882494626,
  0.000000008898441247313,
  0.0000000044492206236565,
  0.00000000222461031182825,
  0.000000001112305155914125,
];

var tileGrid = new ol.tilegrid.TileGrid({
  resolutions: resolutions,
});

var tileSource = new ol.source.TileImage({
  tileGrid: tileGrid,
  url: 'https://dynamic.t0.tiles.ditu.live.com/comp/ch/{quadkey}?it=G,OS,L&mkt=zh-cn&cstl=w4c&ur=CN',
});

var customLayer = new ol.layer.Tile({
  source: tileSource,
});

var map = new ol.Map({
  target: 'map-container',
  layers: [bingLayer, customLayer],
  view: view,
});