import echarts from 'echarts'
import 'echarts/map/js/china' 解决方法， echarts 需要5.0以下
"dependencies": {
"core-js": "^3.6.5",
"echarts": "^4.9.0",
"element-ui": "^2.13.2",
"swiper": "^6.1.1",
"vue": "^2.6.11",
"vue-awesome-swiper": "^3.1.3",
"vue-router": "^3.2.0"
},