string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8E%A8%E5%B9%BF%E5%AE%A3%E4%BC%A0%E7%9A%84%E6%96%B9%E5%BC%8F => Failed to connect to 101.89.159.206 port 38100: Connection refused"
推广宣传的方式
