string(348) "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%E4%BA%92%E8%81%94%E7%BD%91%E9%87%91%E8%9E%8D%E7%9A%84%E5%8F%91%E5%B1%95%E7%BB%8F%E5%8E%86%E4%BA%86%E5%87%A0%E4%B8%AA%E9%98%B6%E6%AE%B5%E7%9A%84%E5%8F%98%E5%8C%96 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
中国互联网金融的发展经历了几个阶段的变化
