string(226) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=s16949%E6%94%B9%E7%89%88%E5%90%8E%E5%8F%AB%E4%BB%80%E4%B9%88 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
s16949改版后叫什么
