千分位展示echarts 配置项内容和展示

为什么柱状图上面不显示千分位

      option = {
      "grid": {
        "bottom": "3%", 
        "containLabel": true, 
        "left": "3%", 
        "right": "4%"
      }, 
      "legend": {
        "data": [
          "ACTUAL", 
          "ON TARGET BUDGET"
        ]
      }, 
      "series": [
        {
          "barWidth": "50%", 
          "data": [
            4435425.0, 
            2400000.0
          ], 
          "itemStyle": {
            "emphasis": {
              "barBorderWidth": 1, 
              "shadowBlur": 10, 
              "shadowColor": "rgba(0, 0, 0, 0.5)", 
              "shadowOffsetX": 0, 
              "shadowOffsetY": 0
            }, 
            "normal": {
              "color": "#ED611E"
            }
          }, 
          "label": {
            "normal": {
              "position": "inside", 
              "formatter": function(a){return a.value.toLocaleString()},
              "show": true
            }
          }, 
          "markLine": {
            "data": [
              [
                {
                  "type": "min"
                }, 
                {
                  "type": "max"
                }
              ]
            ], 
            "label": {
              "normal": {
                "formatter": function(a){return a.value.toLocaleString()},
                "position": "middle"
              }
            }, 
            "lineStyle": {
              "normal": {
                "color": "orange", 
                "type": "dashed"
              }
            }
          }, 
          "name": "", 
          "type": "bar"
        }
      ], 
      "toolbox": {
        "feature": {
          "saveAsImage": {
            "show": true
          }
        }, 
        "show": false
      }, 
      "xAxis": [
        {
          "data": [
            "ACTUAL", 
            "ON TARGET BUDGET"
          ], 
          "type": "category"
        }
      ], 
      "yAxis": [
        {
          "splitLine": {
            "show": false
          }, 
          "type": "value"
        }
      ]
    }