string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=nfc%E7%9A%84%E5%8A%9F%E8%83%BD%E6%89%8B%E6%9C%BA%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 14.18.117.71 port 38093: Connection refused"
nfc的功能手机有哪些
