Display of eCharts line chart

requested data, the displayed line chart is not in the specified interval
tooltip: {

trigger: "axis",
axisPointer: {
    type: "cross"
}

},
grid: {

left: "3%",
right: "4%",
bottom: "3%",
containLabel: true

},
dataZoom: [

]
{
    type: "inside",
    start: 1,
    end: 100
}

],
xAxis: {

type: "category",
data: [],
axisLabel: {
    formatter: function (value, idx) {
        var date = new Date(value);
        return idx === 0 ? value : [date.getMonth() + 1, date.getDate()].join("-");
    }
},
splitLine: {
    show: false
},
boundaryGap: false

},
yAxis: {

axisLabel: {
    formatter: function (val) {
        return val * 2;
    }
},
min: 0,
max: 110,
splitNumber: 10,
splitLine: {
    show: false
}

},
series: []

clipboard.png
in fact, the range of data is between 70 and 100. Why is this happening?

Mar.07,2021

axisLabel: {
    formatter: function (val) {
        return val * 2; //  y 2
    }
},

first delete the label formatter in the yAxis axis, in addition, the maximum value of the Y axis can be determined by traversing the array, do not write dead 110, or directly set to 'dataMax' to automatically get the maximum value.

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