1:https://baike.baidu.com/item/%E6%99%BA%E8%83%BD%E5%AE%B6%E5%B1%85/686345
2:https://baike.baidu.com/item/%E7%89%A9%E8%81%94%E7%BD%91/7306589
3:https://zhuanlan.zhihu.com/p/139853835
4:https://aws.amazon.com/cn/what-is/iot/
5:https://www.ibm.com/cn-zh/topics/internet-of-things