string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9D%A8%E5%AE%B6%E5%B0%86%E7%9A%84%E6%9D%A5%E5%8E%86%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
杨家将的来历是什么
