string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%8F27%E6%88%98%E6%96%97%E6%9C%BA%E5%9C%A8%E4%B8%AD%E5%9B%BD%E9%80%80%E5%BD%B9%E4%BA%86%E5%90%97 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
苏27战斗机在中国退役了吗
