string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A6%82%E4%BD%95%E6%8E%A8%E5%B9%BFpos%E6%9C%BA%E4%B8%9A%E5%8A%A1 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
如何推广pos机业务
