string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%96%E5%AE%B6%E5%BA%94%E5%BD%93%E5%B1%A5%E8%A1%8C%E7%9A%84%E4%B9%89%E5%8A%A1 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
卖家应当履行的义务
