旧的参考文档：

• https://www.cnblogs.com/cokolxvd/p/11535134.html
• https://www.jianshu.com/p/87fd129b9fda
• https://developers.weixin.qq.com/community/develop/doc/000a447b4f86608d7848d77f956806
• https://zhuanlan.zhihu.com/p/76013314
• https://juejin.cn/post/6844903933370974215
• https://www.cnblogs.com/ifannie/p/11477254.html
• https://blog.csdn.net/impossible1994727/article/details/100888131