Use the line chart in the echarts chart for statistical analysis. Found the same data, the lines do not intersect, what is the problem? Ask a god for advice?

As shown in the figure, the data on Saturday are all 330. But the five lines just don’t intersect

<script src="/Public/Admin/echarts/dist/echarts.js"></script>
<script type="text/javascript">
require.config ({

paths: {
    echarts: '/Public/Admin/echarts/dist'
}

});

require(

[
    'echarts',
    'echarts/chart/line'
],
function (ec) {
    var myChart = ec.init(document.getElementById('tubiao')); 
    
    var option = {
tooltip : {
    trigger: 'axis'
},
legend: {
    data:['邮件营销','联盟广告','视频广告','直接访问','搜索引擎']
},
toolbox: {
    show : true,
    feature : {
        mark : {show: true},
        dataView : {show: true, readOnly: false},
        magicType : {show: true, type: ['line', 'bar', 'stack', 'tiled']},
        restore : {show: true},
        saveAsImage : {show: true}
    }
},
calculable : true,
xAxis : [
    {
        type : 'category',
        boundaryGap : false,
        data : ['周一','周二','周三','周四','周五','周六','周日']
    }
],
yAxis : [
    {
        type : 'value'
    }
],
series : [
    {
        name:'邮件营销',
        type:'line',
        stack: '总量',
        data:[0, 132, 101, 134, 90, 330, 210]
    },
    {
        name:'联盟广告',
        type:'line',
        stack: '总量',
        data:[0, 182, 191, 234, 290, 330, 310]
    },
    {
        name:'视频广告',
        type:'line',
        stack: '总量',
        data:[0, 232, 201, 154, 190, 330, 410]
    },
    {
        name:'直接访问',
        type:'line',
        stack: '总量',
        data:[0, 332, 301, 334, 390, 330, 320]
    },
    {
        name:'搜索引擎',
        type:'line',
        stack: '总量',
        data:[0, 932, 901, 934, 1290, 330, 1320]
    }
]

};

 
    myChart.setOption(option); 
}

);

</script>