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option = {
    xAxis: {
        type: 'category',
        data: ['1点', '2点', '3点', '4点', '5点', '6点', '7点', '8点', '9点', '10点', '11点']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [0, -5, -7, 4, 3, 2, 1, 3, -3, 1],
        type: 'line',
                    label: {
                normal: {
                    show: true,
                }},
                    markLine : {
                data : [
                    // 纵轴，默认
                    {name: '', yAxis: 1, lineStyle: {color: 'red'}},
                    {name: '', yAxis: -3, lineStyle: {color: 'red'}},
                  
                ]
            }
    }]
};