string(284) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%9F%A9%E5%9B%BD%E7%94%9F%E6%B4%BB%E6%B0%B4%E5%B9%B3%E4%B8%8E%E4%B8%AD%E5%9B%BD%E5%AF%B9%E6%AF%94%E5%88%86%E6%9E%90 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
韩国生活水平与中国对比分析
