string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%94%B9%E7%AD%BE%E4%B8%8D%E8%83%BD%E5%BE%80%E5%90%8E%E6%94%B9%E4%B8%80%E5%A4%A9%E5%90%97 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
改签不能往后改一天吗
