string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%8E%B0%E5%9C%A8%E6%9C%89%E8%B5%84%E9%87%91%E6%8A%95%E8%B5%84%E4%BB%80%E4%B9%88 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
现在有资金投资什么
