echarts用了城市地图打包后china-cities.json体积太大，怎么处理？

问题遇到的现象和发生背景

echarts用了城市地图打包后china-cities.json体积太大，怎么处理？求分析一下

问题相关代码，请勿粘贴截图
import chinaCities from 'echarts/map/json/china-cities.json';
echarts.registerMap("chinaCities", chinaCities);
运行结果及报错内容

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我的解答思路和尝试过的方法
我想要达到的结果

要将文件体积修改。就得把tab和空格键全去掉。

初步处理，体积减小1M，单独引入所需要的城市(我这里只用到了浙江省的城市和上海市)

import zhejiangCities from 'echarts/map/json/province/zhejiang.json';
export function getMyChinaCites() {
  const showCityShortIds = showCityIds.map(x => x.slice(0, 2));
  const myChinaCities = deepClone(zhejiangCities);

  china.features.forEach(item => {
    const cityShortId = item.id.slice(0, 2);
    if (showCityShortIds.includes(cityShortId)) {
      myChinaCities.features.push(item);
    }
  })
  myChinaCities.features.forEach(item => {
    item.properties.name = item.properties.name.replace('市', '');
  })
  return myChinaCities;
}
const chinaCities = getMyChinaCites();
echarts.registerMap("chinaCities", chinaCities);

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