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The first time to record real time with an irreversible, unpredictable time algorithm

The first time to release a set of restricted access to the set of privileges

The first time to realize the sweep history and reproduction.

The first time I took a photo with a QR code.

The first time to record and correlate the different subjects, time, place, and scene.

The first time to realize the transfer control of the sharing session.

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Origin

Self-introduction

Refused to false