echarts如何在每个柱状图上都显示气泡详解（好看的柱状图）

<script>
var myChart = echarts.init(document.getElementById('salesVolume'));
option = {
title : {
text: '近七天销售量（单位：万元）',
textStyle:{
color:'#75fcd7',
fontSize: 20,
fontWeight: 'normal',
align: 'left',
fontFamily:"微软雅黑"
}
},
grid:{
//  top:40,
x:50,
//      y:20,
bottom:20,
borderWidth:80
},//柱状图的大小
tooltip : {
trigger: 'axis',
axisPointer : {            // 坐标轴指示器，坐标轴触发有效
type : 'shadow'        // 默认为直线，可选为：'line' | 'shadow'
}
},
legend: {
data:['近七天销售量（单位：万元）']
},

xAxis : [
{
axisTick:{
show:false  //刻度消失
},
splitLine:{show: false},
type : 'category',
axisLabel: {
show: true,
textStyle: {
color: '#fff'
}
},
axisLine: {
show: true,
lineStyle: {
color:'#7192ca',
width:2
}
},

data : ['11-15','11-16','11-17','11-18','11-19','11-20','11-21']
},

],
yAxis : [
{
axisTick:{
show:false  //刻度消失
},
splitLine:{show: false},//去除网格线
type : 'value',
nameTextStyle:{
color:'#fff'
},
axisLabel : {
formatter: '{value}',
textStyle: {
color: '#fff',
//                  fontSize:16
}
},
axisLine: {
show: true,
lineStyle: {
color:'#7192ca',
width:2
}
},

}
],
series : [
{
name:'销售量',
type:'bar',
barWidth : 30,
itemStyle: {
emphasis: {
barBorderRadius: [10, 10, 10, 10]
},//圆角
normal: {
color: function(params) {
// build a color map as your need.

be47
var colorList = ['#ec635a','#ed719e','#c36ff6','#736af6','#7993f7','#86d4fb','#91fce7'];
return colorList[params.dataIndex]  //柱状图的颜色
}
}
},
data:[5, 10, 15, 20, 25, 30, 50],
markPoint : {
symbol:'pin',//标记类型
symbolSize: 40,//图形大小
itemStyle: {
normal: {
borderColor: '#fff',
borderWidth: 1,            // 标注边线线宽，单位px，默认为1
label: {
show: true
}
}
},
data : [//配置项
{value:'5',xAxis: 0, yAxis: 5},
{value:'10',xAxis:1, yAxis: 10},
{value:'15',xAxis:2, yAxis: 15},
{value:'20',xAxis:3, yAxis: 20},
{value:'25',xAxis:4, yAxis: 25},
{value:'30',xAxis:5, yAxis: 30},
{value:'50',xAxis:6, yAxis: 50},
]
},

},

]
};
myChart.setOption(option);
window.onresize = function(){
myChart.resize();
}//组件随着页面的缩放而缩放
</script>