NFC business card

In an accidental group meeting on May 10th (I forgot whether it was the "National College Student Electronic Design Competition Exchange Group" or Lichuang EDA's "2021 National Competition Support Group"), I saw someone posting [[successful] nfc-based PCB business card](https://oshwhub.com/scarrr0725/ji-yu-nfcde-ming-pian-ji-ji-yu-a) I looked at it and found it very interesting. Wouldn't it be nice to make an NFC business card that not only has the functions of an ordinary business card, but also allows you to add contacts with just one stick on your phone, making the other party remember you? With a little modification, it can also be made into a small confession card, a scene automation label, or even a simulated meal card and transportation card... Hmm, it’s interesting to think about it hhhh I checked some information and saw what looked like [the original design of the NFC business card]( https://www.instructables.com/PCB-Business-Card-With-NFC/), very detailed, very English, difficult to read quickly... I also carefully looked at the core component of the NFC business card - the radio frequency card chip The chip manual of NT3H1101W0FHKH, this is an NTAG I2C - Energy harvesting NFC Forum Type 2 Tag with field detection pin and I2C interface...emmm, that is, this chip can communicate through IIC or RF; it can also be obtained from RF Energy is emitted from the Vout pin...