var option = {
    series: {
        type: 'sunburst',
        data: [{
            name: 'A',
            value: 10,
            children: [{
                value: 3,
                name: 'Aa',
                itemStyle: {
                    color: 'red'
                }
            }, {
                value: 5,
                name: 'Ab'
            }]
        }, {
            name: 'B',
            children: [{
                name: 'Ba',
                value: 4
            }, {
                name: 'Bb',
                value: 2
            }],
            itemStyle: {
                color: 'red'
            }
        }, {
            name: 'C',
            value: 3
        }],
        itemStyle: {
            color: '#aaa'
        },
        levels: [{
            // 留给数据下钻的节点属性
        }, {
            itemStyle: {
                color: 'blue'
            }
        }]
    }
};