<BarChart
  width={500}
  height={300}
  series={[
    { data: pData, label: 'pv', stack: 'stack1' },
    { data: amtData, label: 'amt' },
    { data: uData, label: 'uv', stack: 'stack1' },
  ]}
  xAxis={[{ data: xLabels, scaleType: 'band' }]}
/>