string(378) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=sop%E4%B8%BB%E8%A6%81%E7%94%A8%E4%BA%8E%E8%AF%B4%E6%98%8E%E4%BB%80%E4%B9%88%E6%97%B6%E9%97%B4%E5%86%85%E4%BA%A7%E5%93%81%E7%B3%BB%E5%88%97%E7%9A%84%E9%94%80%E5%94%AE%E5%92%8C%E7%94%9F%E4%BA%A7%E5%A4%A7%E7%BA%B2 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
sop主要用于说明什么时间内产品系列的销售和生产大纲
