string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B8%82%E6%94%BF%E5%B7%A5%E7%A8%8B%E7%BD%91%E7%BB%9C%E5%9B%BE%E7%BB%98%E5%88%B6%E8%A7%84%E5%88%99 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
市政工程网络图绘制规则
