[{
                        name: '北京pm2.5',
                        type: 'scatter',
                        symbolSize: function (val) {
                            return val[1] / 100;
                        },
                        coordinateSystem: 'calendar',
                        data: getVirtulData(2017)
                    }/*,
                    {
                        name: '北京AQI',
                        type: 'scatter',
                        symbolSize: function (val) {
      