string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BE%B7%E9%82%A6%E6%98%AF%E5%9B%BD%E6%9C%89%E8%BF%98%E6%98%AF%E7%A7%81%E8%90%A5%E4%BC%81%E4%B8%9A => Failed to connect to 101.89.117.144 port 38005: Connection refused"
德邦是国有还是私营企业
