[echarts] line chart echarts double arrow plus text

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option = {<!-- -->
    tooltip: {<!-- -->
        trigger: 'axis',
    },
    xAxis: [
        {<!-- -->
            type: 'category',
            boundaryGap: false,
            axisTick: {<!-- -->
                alignWithLabel: true,
            },
            axisLabel: {<!-- -->
                textStyle: {<!-- -->
                    fontSize: 20,
                    fontWeight: 'bold',
                },
                formatter: function (value, index) {<!-- -->
                    if (index == 0) {<!-- -->
                        return '';
                    } else {<!-- -->
                        return value + 'month';
                    }
                },
            },
            axisLine: {<!-- -->
                lineStyle: {<!-- -->
                    color: '#2E75B6',
                    shadowColor: '#2E75B6',
                    shadowOffsetX: '24',
                    width: 5,
                },
                // onZero: true,
                symbol: ['none', 'arrow'],
                symbolSize: [13, 20],
                symbolOffset: [0, 40],
            },
        },
    ],
    yAxis: {<!-- -->
        type: 'value',
        splitNumber: 5,
        max: 150,
        splitLine: {<!-- -->
            lineStyle: {<!-- -->
                type: 'dashed',
                color: '#DDD',
            },
        },
        axisLabel: {<!-- -->
            show: false,
            textStyle: {<!-- -->
                fontSize: 20,
                fontWeight: 'bold',
            },
        },
        axisLine: {<!-- -->
            lineStyle: {<!-- -->
                color: '#2E75B6',
                shadowColor: '#2E75B6',
                shadowOffsetY: '-24',
                width: 5,
            },
            symbol: ['none', 'arrow'],
            symbolSize: [13, 20],
            symbolOffset: [0, 40],
        },
        nameTextStyle: {<!-- -->
            color: '#999',
        },
        splitArea: {<!-- -->
            show: false,
        },
    },

    visualMap: {<!-- -->
        type: 'piecewise',
        text: ['High', 'Low'],
        show: false,
        dimension: 0,
        seriesIndex: 0,
        pieces: [
            {<!-- -->
                gt: 0,
                LTE: 1,
                color: '#9DD3E8',
            },
            {<!-- -->
                gt: 1,
                LTE: 2,
                color: '#F39494',
            },
            {<!-- -->
                gt: 2,
                LTE: 3,
                color: 'rgba(178,219,158,0.5)',
            },
            {<!-- -->
                gt: 3,
                LTE: 4,
                color: 'rgba(178,219,158,0.7)',
                formatter: '444444444',
            },
            {<!-- -->
                gt: 4,
                LTE: 5,
                color: 'rgba(178,219,158,1)',
            },
            {<!-- -->
                gt: 5,
                LTE: 6,
                color: 'rgba(135,155,215,0.7)',
            },
            {<!-- -->
                gt: 6,
                LTE: 7,
                color: 'rgba(135,155,215,1)',
            },
        ],
    },
    series: [
        {<!-- -->
            name: 'Growth stage',
            type: 'line',
            symbol: 'emptyCircle',
            showAllSymbol: true,
            symbolSize: 12,
            hoverAnimation: false,
            data: [
                [0, 0],
                [1, 0],
                [12, 30],
                [24, 75],
                [36, 95],
                [48, 104],
                [60, 110],
                [72, 116],
                [84, 120],
            ],
            areaStyle: {<!-- -->},
            lineStyle: {<!-- -->
                normal: {<!-- -->
                    width: 5,
                    color: '#f26264',
                },
            },

            itemStyle: {<!-- -->
                normal: {<!-- -->
                    color: '#fff',
                    borderColor: '#f26264',
                },
            },
            smooth: true,
            markLine: {<!-- -->
                symbol: 'none',
                data: [
                    [
                        {<!-- -->
                            name: 'Preparation period',
                            coord: [0, 25],
                            symbol: 'arrow',
                            label: {<!-- -->
                                fontSize: 18,
                                formatter: ['{a|Phase 1:}', '{b|preparation period}'].join('\\
'),
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#333',
                                        lineHeight: 28,
                                        fontSize: 18,
                                    },
                                    b: {<!-- -->
                                        color: '#10243F',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    color: '#708AB7',
                                    width: 2,
                                    type: 'solid',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [1, 25],
                            symbol: 'arrow',
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'cultivation period',
                            coord: [1, 60],
                            symbol: 'arrow',
                            label: {<!-- -->
                                fontSize: 18,
                                formatter: ['{a|stage 2:}', '{b|cultivation period}'].join('\\
'),
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#333',
                                        lineHeight: 28,
                                        fontSize: 18,
                                    },
                                    b: {<!-- -->
                                        color: '#632523',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    color: '#708AB7',
                                    width: 2,
                                    type: 'solid',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [2, 60],
                            symbol: 'arrow',
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'Growth period',
                            coord: [2, 120],
                            symbol: 'arrow',
                            label: {<!-- -->
                                fontSize: 18,
                                formatter: '{a|stage 3:}' + '{b|growth stage}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#333',
                                        lineHeight: 28,
                                        fontSize: 18,
                                    },
                                    b: {<!-- -->
                                        color: '#E87A0A',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    color: '#708AB7',
                                    width: 2,
                                    type: 'solid',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [5, 120],
                            symbol: 'arrow',
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'Maturity',
                            coord: [5, 130],
                            symbol: 'arrow',
                            label: {<!-- -->
                                fontSize: 18,
                                formatter: '{a|stage 4:}' + '{b|maturity period}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#333',
                                        lineHeight: 28,
                                        fontSize: 18,
                                    },
                                    b: {<!-- -->
                                        color: '#C2524D',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    color: '#708AB7',
                                    width: 2,
                                    type: 'solid',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [7, 130],
                            symbol: 'arrow',
                        },
                    ],

                    [
                        {<!-- -->
                            name: 'Growth period I',
                            coord: [2, 20],
                            label: {<!-- -->
                                fontSize: 16,
                                formatter: '{a|growth period I}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#E87A0A',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    width: 0,
                                    color: '#708AB7',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [3, 20],
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'Growth II',
                            coord: [3, 40],
                            label: {<!-- -->
                                fontSize: 16,
                                formatter: '{a|Growth II}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#E87A0A',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    width: 0,
                                    color: '#708AB7',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [4, 40],
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'Growth Stage III',
                            coord: [4, 60],
                            label: {<!-- -->
                                fontSize: 16,
                                formatter: '{a|Growth Stage III}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#E87A0A',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    width: 0,
                                    color: '#708AB7',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [5, 60],
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'Maturity I',
                            coord: [5, 70],
                            label: {<!-- -->
                                fontSize: 16,
                                formatter: '{a|maturity period I}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#C2524D',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    width: 0,
                                    color: '#708AB7',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [6, 70],
                        },
                    ],
                    [
                        {<!-- -->
                            name: 'Maturity II',
                            coord: [6, 85],
                            label: {<!-- -->
                                fontSize: 16,
                                formatter: '{a|Maturity II}',
                                rich: {<!-- -->
                                    // public style
                                    a: {<!-- -->
                                        color: '#C2524D',
                                        fontWeight: 'bold',
                                        fontSize: 18,
                                    },
                                },
                                position: 'insideMiddleTop',
                            },
                            lineStyle: {<!-- -->
                                normal: {<!-- -->
                                    width: 0,
                                    color: '#708AB7',
                                },
                            },
                        },
                        {<!-- -->
                            coord: [7, 85],
                        },
                    ],

                    {<!-- -->
                        name: '',
                        xAxis: '1',
                        label: {<!-- -->
                            show: false,
                        },
                        lineStyle: {<!-- -->
                            normal: {<!-- -->
                                color: '#708AB7',
                                width: 2,
                                type: 'solid',
                            },
                        },
                    },
                    {<!-- -->
                        name: '',
                        xAxis: '12',
                        label: {<!-- -->
                            show: false,
                        },
                        lineStyle: {<!-- -->
                            normal: {<!-- -->
                                color: '#708AB7',
                                width: 2,
                                type: 'solid',
                            },
                        },
                    },
                    {<!-- -->
                        name: '',
                        xAxis: '48',
                        label: {<!-- -->
                            show: false,
                        },
                        lineStyle: {<!-- -->
                            normal: {<!-- -->
                                color: '#708AB7',
                                width: 2,
                                type: 'solid',
                            },
                        },
                    },
                    {<!-- -->
                        name: '',
                        xAxis: '72',
                        label: {<!-- -->
                            show: false,
                        },
                        lineStyle: {<!-- -->
                            normal: {<!-- -->
                                color: '#708AB7',
                                width: 2,
                                type: 'solid',
                            },
                        },
                    },
                ],
            },
        },
    ],
};