var myChart = echarts.init(document.getElementById('main'));
function randomData() {

return Math.round(Math.random()*1000);

}

option = {

    title: {
        text: '微信数据量',
        //subtext: '纯属虚构',
        left: 'center'
    },
    tooltip: {
        trigger: 'item'
    },
    legend: {
        orient: 'vertical',
        left: 'left',
        data:['省份数据']
    },
    visualMap: {
        min: 0,
        max: 2500,
        left: 'left',
        top: 'bottom',
        text: ['高','低'],           // 文本，默认为数值文本
        calculable: true
    },
    toolbox: {
        show: true,
        orient: 'vertical',
        left: 'right',
        top: 'center',
        feature: {
            dataView: {readOnly: false},
            restore: {},
            saveAsImage: {}
        }
    },
    series: [
        {
            name: '省份数据',
            type: 'map',
            mapType: 'china',
            roam: false,
            label: {
                normal: {
                    show: true
                },
                emphasis: {
                    show: true
                }
            },
            data:[
                {name: '北京',value: randomData() },
                {name: '天津',value: randomData() },
                {name: '上海',value: randomData() },
                {name: '重庆',value: randomData() },
                {name: '河北',value: randomData() },
                {name: '河南',value: randomData() },
                {name: '云南',value: randomData() },
                {name: '辽宁',value: randomData() },
                {name: '黑龙江',value: randomData() },
                {name: '湖南',value: randomData() },
                {name: '安徽',value: randomData() },
                {name: '山东',value: randomData() },
                {name: '新疆',value: randomData() },
                {name: '江苏',value: randomData() },
                {name: '浙江',value: randomData() },
                {name: '江西',value: randomData() },
                {name: '湖北',value: randomData() },
                {name: '广西',value: randomData() },
                {name: '甘肃',value: randomData() },
                {name: '山西',value: randomData() },
                {name: '内蒙古',value: randomData() },
                {name: '陕西',value: randomData() },
                {name: '吉林',value: randomData() },
                {name: '福建',value: randomData() },
                {name: '贵州',value: randomData() },
                {name: '广东',value: randomData() },
                {name: '青海',value: randomData() },
                {name: '西藏',value: randomData() },
                {name: '四川',value: randomData() },
                {name: '宁夏',value: randomData() },
                {name: '海南',value: randomData() },
                {name: '台湾',value: randomData() },
                {name: '香港',value: randomData() },
                {name: '澳门',value: randomData() }
            ]
        }
    ]
};

myChart.setOption(option);

怎么在后台把数据放进去啊，，还有，这些数据是哪里来的。。求教大神。