string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=5g%E6%99%BA%E8%83%BD%E5%AE%B6%E5%B1%85%E5%BA%94%E7%94%A8%E8%8C%83%E5%9B%B4 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
5g智能家居应用范围
