string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%BE%93%E5%85%A5%E8%BF%90%E5%8D%95%E5%8F%B7%E6%9F%A5%E8%AF%A2%E4%BA%AC%E4%B8%9C => Failed to connect to 14.18.117.71 port 38133: Connection refused"
输入运单号查询京东
