string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%97%A0%E4%BA%BA%E5%94%AE%E8%B4%A7%E6%9C%BA%E8%BF%9B%E8%B4%A7%E6%B8%A0%E9%81%93 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
无人售货机进货渠道
