Hello Martinez,
Thank you for your prompt reply.
I'm an android developer and I'm trying to develop an app to connect this board,here is a picture of my board.
My board: QN9020+CLRC663(BLE+NFC)

The tag is the bottom left on the board.
Through my App, I can successfully scan and connect the board,but I can't read any information returned by the NFC.
Here is a picture of my BLETool.

But I can read/write successfully with the BLETool you provide,here is the picture

After BLE connection, do I need to send some instructions to receive the tag information read by NFC?
Or I need import a jar to use the API you provide?