y轴数据差距过大如何设置过度带echarts 配置项内容和展示

bar图中可以看出有新增和全部用户2种数据，但是新增用户占比例太小看不出来效果，如果我想把新增用户显示出来，问问各位大神有没有办法在y轴中间设置一段过度带，让y轴过渡带下方数据刻度间距的值较小，过渡带y轴刻度间距的值较大，这样新增数据也能显示出来

      app.title = '坐标轴刻度与标签对齐';

var data1=[
                592,
                91,
                63,
                160,
                96,
                60,
                71,
                171,
                85,
                45
            ]
var data2 =  [
                168510,
                74147,
                56809,
                56405,
                53744,
                50312,
                31705,
                18043,
                15691,
                15265
            ]
function chanArray(data1,data2){
    var maxData1 = Math.max.apply(null, data1)
    var maxData2 = Math.max.apply(null, data2)
    
    var multiple = Math.floor(maxData2/maxData1)/2
    
    var data = [];
    for(var i in data1){
        data.push(-data1[i]*multiple);
    }
    
    return [data,multiple];
}
option = {
    backgroundColor: '#404a59',
    "color": [
        "#00ccff",
        "#0000cc",
        "#0033ff",
        "#000099",
        "#ffffff",
        "#3366ff",
        "#00cccc",
        "#66ffff"
    ],
    "title": {
        "text": "地市用户量",
        "show": false
    },
    "tooltip": {
        "trigger": "axis",
        "axisPointer": {
            "type": "shadow"
        },
        formatter:function(obj){
             var str = "";
             str += obj[0].name+"<br>";
             str += "<span style='display:inline-block;margin-right:5px;border-radius:10px;width:9px;height:9px;background-color:"+obj[1].color+"'></span>"+obj[1].seriesName+":"+obj[1].value+"<br>"
             str += "<span style='display:inline-block;margin-right:5px;border-radius:10px;width:9px;height:9px;background-color:"+obj[0].color+"'></span>"+obj[0].seriesName+":"+Math.abs(obj[0].value/(chanArray(data1,data2)[1]))+"<br>"
            return str;
        }
    },
    "grid": {
        "left": "3%",
        "right": "4%",
        "bottom": "15%",
        "top": "10%",
        "containLabel": true
    },
    "xAxis": [
        {
            "type": "category",
            "data": [
                "成都市",
                "乐山市",
                "德阳市",
                "广元市",
                "绵阳市",
                "自贡市",
                "遂宁市",
                "泸州市",
                "攀枝花市",
                "内江市"
            ],
            "axisLine": {
                "lineStyle": {
                    "color": "#ffffff"
                }
            },
            "axisLabel": {
                "interval": 0
            },
            "axisTick": {
                "alignWithLabel": true
            }
        }
    ],
    "yAxis": [
        {
            "type": "value",
            "axisLine": {
                "lineStyle": {
                    "color": "#ffffff"
                }
            },
            "splitLine": {
                "lineStyle": {
                    "color": "#000099"
                }
            },
           axisLabel:{
		                formatter:function(value, index){
		                        if(value<0){
		                             var al = Math.floor(Math.abs(value/(chanArray(data1,data2)[1]))).toString()
		                             
		                             var al1 = al.charAt(0);
		                             for(var i = 0 ;i< al.length-1;i++){
		                                 al1 += 0
		                             }
		                             return al1                                                                                                                         
		                        }
		                        else{
		                            return value
		                        }
		                    }
		            }
        }
    ],
    "series": [
        {
            "name": "新增",
            "data": chanArray(data1,data2)[0],
            "stack": "total",
            "type": "bar"
        },
        {
            "name": "全部",
            "data": data2,
            "stack": "total",
            "type": "bar"
        }
    ],
    "legend": {
        "data": [
            "新增",
            "全部"
        ],
        "textStyle": {
            "color": [
                "#ffffff"
            ]
        },
        "top": "bottom",
        "left": "right"
    }
};