string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%8A%E5%B8%82%E5%85%AC%E5%8F%B8%E4%BB%80%E4%B9%88%E6%9D%A1%E4%BB%B6 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
上市公司什么条件
