string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BA%BF%E4%B8%8A%E4%BF%83%E9%94%80%E9%83%BD%E6%9C%89%E4%BB%80%E4%B9%88%E6%96%B9%E5%BC%8F => Failed to connect to 14.18.117.71 port 38164: Connection refused"
线上促销都有什么方式
