string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E5%9B%BD%E5%9B%BD%E8%88%AA%E5%8E%86%E5%B9%B4%E8%82%A1%E4%BB%B7 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
中国国航历年股价
