string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=nfc%E5%8A%9F%E8%83%BD%E7%9A%84%E6%89%8B%E6%9C%BA%E6%9C%89%E4%BB%80%E4%B9%88%E7%94%A8%E9%80%94 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
nfc功能的手机有什么用途
