string(250) "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%E6%89%BE%E9%A1%BE%E5%AE%A2%E5%91%A2 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
如何推广pos机找顾客呢
