string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%89%8B%E6%9C%BAnfc%E5%8A%9F%E8%83%BD%E7%94%A8%E5%A4%84%E5%A4%A7%E5%90%97 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
手机nfc功能用处大吗
