string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E9%94%80%E5%94%AE%E6%98%AF%E5%B9%B2%E5%95%A5%E7%9A%84 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
网络销售是干啥的
