Echarts 双轴如何同时显示标签？

xaxis: [
  {
    min: starttime,
    scale: true,

    axislabel: {
      formatter: function (val) {
        return math.max(0, val - starttime) + " ms";
      },
    },
  },
  {
    min: starttime,
    scale: true,

    axislabel: {
      formatter: function (val) {
        return math.max(0, val - starttime) + " ms";
      },
    },
  },
],

option = {
  xaxis: [
    {
      type: 'category',
      data: ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
    },
    {
      type: 'category',
      data: ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
    }
  ],
  yaxis: [
    {
      type: 'value',
      inverse: true
    },
    {
      type: 'value'
    }
  ],
  series: [
    {
      data: [120, 120, 10, 80, 70, 70, 130],
      type: 'bar',
    },
    {
      data: [10, 20, 110, 50, 30, 20, 80],
      type: 'bar',
      xaxisindex: 1,
      yaxisindex: 1
    }
  ]
};

axisLabel: {
  formatter: function (val) {
    if (val >= startTime) {
      return Math.max(0, val - startTime) + " ms";
    }
  },
},