string(254) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=wifi6%E5%8D%8F%E8%AE%AE%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E5%8F%91%E5%B8%83%E7%9A%84 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
wifi6协议什么时候发布的
