https://blog.csdn.net/qq_42566295/article/details/81129835
https://my.oschina.net/u/929521/blog/1612847
https://echarts.baidu.com/echarts2/doc/example/line1.html
https://www.echartsjs.com/examples/
折线图 如何用ajax获取数据
https://blog.csdn.net/guo3guo/article/details/44199191（有效）
https://www.jianshu.com/p/5745ecf96644
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